| Number | County | Town | Size | Built | Verif | GPS | Description |
| HI-01-01 | Hawaii | Hilo | 10-2015 | N19 43.371 W155 05.393 | In Hilo. On the NW side of Haili St. ? block NE of Kapiolani St. Hexagon bldg. | ||
| HI-01-02 | Hilo | 10-2015 | N19 42.637 W155 06.842 | In Hilo. Ainako Av. W. 0.3 miles from jct with HI200 (Kaumana Dr.) to the school on the N. side of the road at 278. Ernest Bowen de Silva Elementary, 12-sided school. | |||
| HI-01-03 | Hilo | 10-2015 | N19 42.545 W155 06.889 | In Hilo. Ainako Av. W. 0.2 miles from jct with HI200 (Kaumana Dr.), S. on Manulele St. 0.2 miles, turns N. & becomes Palani St. 0.15 miles to the house on the right side of the road up a driveway 100 yds. 12-sided house & octagon garage. | |||
| HI-01-04 | Hilo | ~100' | 2006 | 10-2015 | N19 42.030 W155 05.337 | At Imaloa Astronomy Center in Hilo. At the NE corner of Nowelo St. & Aohoku Pl. Main Theater, true round bldg, cone roof. | |
| HI-01-05 | Hilo | ~60' | 2006 | 10-2015 | N19 42.042 W155 05.318 | Same as HI-01-04. Lobby, true round bldg, cone roof. | |
| HI-01-06 | Hilo | ~60' | 2006 | 10-2015 | N19 42.066 W155 05.320 | Same as HI-01-04. Sky Garden Restaurant, true round bldg, cone roof. | |
| HI-01-07 | Hilo | ~30' | 10-2015 | N19 42.648 W155 04.973 | In Hilo. On the NW side of Mohouli St. 250' NE of Kapiolani St. Higashi Hongwanji Mission, octagon bldg, windowed cupola. | ||
| HI-01-08 | Hilo | ~45' | 10-2015 | N19 43.161 W155 04.557 | In Wailoa River State Park in Hilo. Pauahi St. S. 0.1 miles from jct with HI19 (Kamehameha Av.), E. on Piopio St. 0.25 miles to the bldg. Wailoa Center, 12 sided bldg. | ||
| HI-01-09 | Hilo | 11-2015 | N19 42.113 W155 04.984 | At University of Hawai in Hilo. Lanikaula St. W. 1.3 miles from jct with HI11 (Hawaii Belt Rd.), S. into parking lot. Park & walk S. between the bldgs 200' to the bldg. Student Center, octagon bldg. | |||
| HI-01-10 | Waimea | 11-2015 | N20 01.311 W155 40.195 | At Parker Theater in Waimea. On the NE side of Lindsey Rd. at the intersection with Kawaihae Rd. Ticket Booth, hexagon ticket booth. | |||
| HI-01-11 | Honaunau | 11-2015 | N19 26.521 W155 53.352 | At Bay View Farms ENE of Honaunau. Painted Church Rd. N. 0.85 miles from jct with Keala O Keawe Rd. E. of Honaunau to the bldg on the W. side of the road at 83-5250. Visitors Center, octagon bldg. Appears to be abandoned. | |||
| HI-01-12 | Honaunau | 11-2015 | N19 26.516 W155 53.381 | At Bay View Farms ENE of Honaunau. Painted Church Rd. N. 0.85 miles from jct with Keala O Keawe Rd. E. of Honaunau to the bldg on the W. side of the road at 83-5250 up a driveway 200'. Octagon bldg. Appears to be abandoned. | |||
| HI-01-13 | Captain Cook | 11-2015 | N19 29.183 W155 54.376 | In Captain Cook. HI11 (Mamalahoa Hwy) SE 1.0 miles from jct with Painted Church Rd. to the house on the SW side of the road. 14 sided house. | |||
| HI-01-14 | Honaunau | 11-2015 | N19 25.450 W155 53.125 | E. of Honaunau. Keala O Keawe Rd. E. (curves S.) 2.8 miles from jct with Honaunau Beach Rd. in Honaunau to the house on the W. side of the road. 12 sided house. | |||
| HI-01-15 | Keauhou | 11-2015 | N19 33.484 W155 57.683 | At Mauna Loa Village in Keauhou. At 78-7190 Kaleiopapa St. Hexagon house. | |||
| HI-01-16 | Keauhou | 11-2015 | N19 33.497 W155 57.708 | Same as HI-01-15. Hexagon house. | |||
| HI-01-17 | Keauhou | 11-2015 | N19 33.396 W155 57.710 | Same as HI-01-15. Hexagon house. | |||
| HI-01-18 | Kailua Kona | 11-2015 | N19 34.918 W155 57.115 | S. of Kailua Kona. HI11 (Kuakini Hwy) S. 3.3 miles from jct with Hualalai Rd. in Kailua Kona, E. on Kamehameha III Rd. 100 yds, S. on Walua Rd. 0.55 miles to the house on the W. side of the road at 78-6852. Octagon house. | |||
| HI-01-19 | Kailua Kona | 11-2015 | N19 35.345 W155 58.302 | S. of Kailua Kona. ALii Dr. S. 3.75 miles from jct with Hualalai Rd. in Kailua Kona to the house on the W. side of the road at 77-6546. Octagon house. | |||
| HI-01-20 | Kailua Kona | 11-2015 | N19 35.374 W155 58.251 | S. of Kailua Kona. ALii Dr. S. 3.65 miles from jct with Hualalai Rd. in Kailua Kona, E. on Laaloa Av. 1 block, S. on Princess Keelikolani Dr. 0.1 miles, W. on Nahale Pl 150' to the house on the N. side of the road at 77-111. Octagon house. | |||
| HI-01-21 | Kailua Kona | 11-2015 | N19 36.570 W155 57.978 | S. of Kailua Kona. ALii Dr. S. 1.5 miles from jct with Hualalai Rd. in Kailua Kona, W. on Lako St. 1 block, S. on Kupuna St. 0.1 miles to the house on the W. side of the road at 76-6344. Hexagon house, set of 5 hexagon bldgs connected. | |||
| HI-01-22 | Kailua Kona | 11-2015 | N19 37.936 W155 59.416 | In Kailua Kona. Alii Dr. S. 0.3 miles from jct with Hualalai Rd., veer right onto Kahakai Rd. & continue S. 0.1 miles to the bldg on the W. side of the road. Alii Surf, 10 sided bldg. | |||
| HI-01-23 | Kailua Kona | 11-2015 | N19 37.928 W155 59.429 | In Kailua Kona. Alii Dr. S. 0.3 miles from jct with Hualalai Rd., veer right onto Kahakai Rd. & continue S. 0.1 miles to the bldg on the W. side of the road. Don The Beachcomber Tiki Grill, round bldg. | |||
| HI-02-01 | Honolulu | Honolulu | ~75' | 1976 | 10-2015 | N21 16.592 W157 49.531 | In Honolulu. At the E. corner of Kalakaua & Kaiulani Avs. Hyatt Regency Waikiki N. tower, octagon bldg. |
| HI-02-02 | Honolulu | ~75' | 1976 | 10-2015 | N21 16.549 W157 49.489 | In Honolulu. At the W. corner of Koa & Uluniu Avs. Hyatt Regency Waikiki N. tower, octagon bldg. | |
| HI-02-03 | Honolulu | 10-2015 | N21 16.118 W157 49.257 | In Honolulu. Monsarrat Av. W. 0.3 miles from jct with Paki Av., S. & park. Walk S. 100 yds to the bldg. Kapiolani Bandstand, round bldg. | |||
| HI-02-04 | Honolulu | ~85' | 10-2015 | N21 16.554 W157 47.120 | In Honolulu. On the W. side of Kilauea Av. 0.1 miles N. of Pahoa Av. Bank of Hawaii, true round bldg. | ||
| HI-02-05 | Honolulu | ~110' | 10-2015 | N21 17.021 W157 48.141 | In Honolulu. On the E. side of 9th Av. 200' S. of Waialae Av. Kaimuki Jade, high rise, 18 sided bldg. | ||
| HI-02-06 | Honolulu | ~300' | 1994 | 10-2015 | N21 17.654 W157 49.139 | At University of Hawaii in Honolulu. At the NE corner of I-H1 exit 24 & University Av. Stan Sheriff Center Arena, true round bldg, dome roof. | |
| HI-02-07 | Honolulu | 10-2015 | N21 17.686 W157 48.802 | At University of Hawaii in Honolulu. Kalele Rd. NE 0.5 miles from jct with Waialae Av. (near I-H1 exit 25) to the bldg to the S. Hale Aloha Lehua Tower, true round bldg. | |||
| HI-02-08 | Honolulu | 10-2015 | N21 17.678 W157 48.764 | At University of Hawaii in Honolulu. Kalele Rd. NE 0.45 miles from jct with Waialae Av. (near I-H1 exit 25) to the bldg to the W. Hale Aloha Ilima Tower, true round bldg. | |||
| HI-02-09 | Honolulu | 10-2015 | N21 17.642 W157 48.762 | At University of Hawaii in Honolulu. Kalele Rd. NE 0.4 miles from jct with Waialae Av. (near I-H1 exit 25) to the bldg to the W. Hale Aloha Mokihana Tower, true round bldg. | |||
| HI-02-10 | Honolulu | 10-2015 | N21 17.637 W157 48.797 | At University of Hawaii in Honolulu. Kalele Rd. NE 0.3 miles from jct with Waialae Av. (near I-H1 exit 25) to the bldg ahead. Hale Aloha Lokelani Tower, true round bldg. | |||
| HI-02-11 | Honolulu | 10-2015 | N21 17.596 W157 49.300 | In Honolulu. University Av. S. 0.1 miles from jct with I-H1 exit 24 to the bldg on the W. side of the road. Varsity Building, true round bldg. | |||
| HI-02-12 | Honolulu | 10-2015 | N21 18.198 W157 50.666 | In Honolulu. At the NE corner of Kinau & Pensacola Sts. First Baptist, octagon church. | |||
| HI-02-13 | Honolulu | 10-2015 | N21 19.568 W157 50.819 | In Honolulu. At the E. corner of Kawananakoa Pl. & Nuuanu Av. Seventh Day Adventist, octagon church. | |||
| HI-02-14 | Honolulu | 10-2015 | N21 20.986 W157 53.588 | In Honolulu. Jarrett White Rd. N. 0.15 miles from jct with H201 exit 3, E. on Mahiole St. 0.1 miles to the school on the S. side of the road. Moanalua Middle School, hexagon school. | |||
| HI-02-15 | Honolulu | ~120' | 10-2015 | N21 20.286 W157 55.825 | In Honolulu. Main St. S. 0.1 miles from jct with HI92 (near H1 exit 15) to the church on the W. side of the road. Holy Family, 12 sided church. | ||
| HI-02-16 | Honolulu | 10-2015 | N21 17.987 W157 51.099 | In Honolulu. On the E. side of Ward Av. 0.1 miles N. of Kapiolani Blvd. Blaisdell Center Box Office, 12 sided bldg, dome roof. | |||
| HI-02-17 | Honolulu | 10-2015 | N21 17.940 W157 51.083 | In Honolulu. At the NE corner of Kapiolani Blvd & Ward Av. Neal Blaisdell Center Arena, 16 sided bldg, dome roof. | |||
| HI-02-18 | Honolulu | 10-2015 | N21 17.774 W157 50.781 | In Honolulu. At the SW corner of Kamaile & Piikoi Sts. Moana Pacific East Tower, oval bldg. | |||
| HI-02-19 | Honolulu | 10-2015 | N21 17.742 W157 50.835 | In Honolulu. At the NE corner of Kapiolani Blvd & Pensacola St. Moana Pacific West Tower, oval bldg. | |||
| HI-02-20 | Honolulu | ~100' | 10-2015 | N21 20.928 W157 55.838 | At Pearl Harbor in Honolulu, Honolulu County, HI. Valkenburgh St. N. 0.3 miles from jct with H1 exit 15, NW on Warden Av. 0.3 miles to the bldg. NEX, Navy Exchange, octagon bldg, windowed cupola. | ||
| HI-02-21 | Aiea | 10-2015 | N21 23.031 W157 56.783 | In Aiea. HI99 (Kamehameha Hwy) NW 1.0 miles from jct with H201 in Aiea to the bldg on the NE side of the road. Territorial Savings Bank, 16 sided bldg. | |||
| HI-02-22 | Wahiawa | 10-2015 | N21 31.634 W158 02.293 | At Dole Plantation N. of Wahiawa. HI80 (Kamehameha Hwy) N. (curves NW) 2.0 miles from jct with H2 exit 8 in Wahiawa, N. on HI99 (Kamehameha Hwy) 0.8 miles to the bldg on the E. side of the road. Dining Hut, round bldg. | |||
| HI-02-23 | Haleiwa | 10-2015 | N21 34.806 W158 06.411 | In Haleiwa. Paalaa Rd. SW 0.1 miles from jct with HI83 (Kamehameha Hwy) to the house on the SE side of the road at 66465. Octagon house. | |||
| HI-02-24 | Honolulu | 10-2015 | N21 17.644 W157 50.447 | In Honolulu. On the W. side of Amana St. ? block N. of Makaloa St. High Rise, round bldg. | |||
| HI-02-25 | Honolulu | 10-2015 | N21 17.630 W157 50.368 | In Honolulu. On the W. side of Kaheka St. ? block S. of Kanunu St. St. Peter & Paul, 12 sided church. | |||
| HI-02-26 | Honolulu | 10-2015 | N21 17.416 W157 50.328 | In Honolulu. At the W. corner of Kona St. & Atkinson Dr. Parking Garage, octagon bldg. | |||
| HI-02-27 | Honolulu | 10-2015 | N21 17.256 W157 50.741 | In Ala Moana Park in Honolulu. Ala Moana Park Dr. S. (curves W.) 0.3 miles from jct with HI92 (Ala Moana Blvd) to the bldg on the S. side of the road. Bathhouse & Restrooms, hexagon bldg. | |||
| HI-02-28 | Honolulu | 10-2015 | N21 16.489 W157 49.460 | In Honolulu. At the NE corner of Uiliuokalani & Kalakaua Avs. Waikiki Circle Hotel, round bldg. | |||
| HI-04-01 | Kauai | Kapaa | 11-2015 | N22 05.231 W159 18.908 | In Kapaa. Kawaihau Rd. N. 0.65 miles from jct with HI56 (Kuhio Hwy), W. on Nunu Rd. 1 block, S. on Liwi Rd. 0.15 miles to the house on the E. side of the road at 4798. 12 sided house. | ||
| HI-04-02 | Kapaa | 11-2015 | N22 03.044 W159 20.040 | S. of Kapaa. HI56 (Kuhio Hwy) S. 2.15 miles from jct with Kauwila St. in Kapaa to the house on the E. side of the road. True round bldg. | |||
| HI-04-03 | Kekaha | 11-2015 | N21 58.541 W159 43.291 | In Kekaha. Akialoa Rd. N. 0.35 miles from jct with HI50 (Kaumualii Hwy), W. on Iwipolena Rd. 1 block, N. on Kawailoa St. to the house on the NW side of the road at 4591. Octagon house, 2 story, windowed cupola. | |||
| HI-04-04 | Lihue | 11-2015 | N21 58.548 W159 22.205 | In Lihue. At the SE corner of HI56 (Kuhio Hwy) & Rice St. Civic Center, 12 sided donut bldg. | |||
| HI-04-05 | Kilauea | 11-2015 | N22 12.565 W159 24.566 | In Kilauea. Kolo Rd. SE 0.1 miles from jct with HI56 (Kuhio Hwy), NE on Kilauea Rd. 0.2 miles to the house on the NW side of the road at 4330. 12 sided house. | |||
| HI-04-06 | Princeville | 11-2015 | N22 12.937 W159 28.681 | In Princeville. Kahaku Rd. N. (goes around a circle) 0.15 miles from jct with HI560 (Kuhio Hwy) & W. on Emmalani Dr. 0.5 miles, S. (curves W.) on Kamalani Ln. 0.1 miles to the house on the S. side of the road at 4179. Hexagon house, large windowed cupola. | |||
| HI-04-07 | Princeville | 11-2015 | N22 12.989 W159 28.762 | In Princeville. Kahaku Rd. N. (goes around a circle) 0.15 miles from jct with HI560 (Kuhio Hwy) & W. on Emmalani Dr. 0.55 miles, S. (curves W.) on Kinau Pl. 0.1 miles to the house on the S. side of the road at 4217. Octagon house, windowed cupola. | |||
| HI-04-08 | Hanalei | 11-2015 | N22 13.399 W159 33.479 | W. of Hanalei. HI560 W. 5.1 miles from jct with Mahimahi Rd. to the house on the N. side of the road. Geodesic house. | |||
| HI-04-09 | Kilauea | 11-2015 | N22 13.819 W159 24.136 | N. of Kilauea. Kolo Rd. SE 0.1 miles from jct with HI56 (Kuhio Hwy) in Kilaueau, NE on Kilauea Rd. 1.9 miles to the bldg on the W. side of the road. Restrooms, hexagon bldg. | |||
| HI-04-10 | Hanalei | 11-2015 | N22 13.385 W159 32.883 | W. of Hanalei. HI560 W. 4.4 miles from jct with Mahimahi Rd., N. on One One Pl 1 block, W. on Alealea Rd. 1 block, N. (turns W.) on Alamoo Rd. to the house on the S. side of the road at 7235. 12 sided house, large windowed cupola. | |||
| HI-05-01 | Maui | Lahaina | 11-2015 | N20 53.232 W156 40.958 | N. of Lahaina. HI30 (Honoapiilani Hwy) N. 0.8 miles from jct with Lahainaluna Rd. in Lahaina to the bldg on the E. side of the road at the SE corner of HI30 & Kapunake St. Across the road from Lahaina Cannery Mall. Octagon bldg, Shell station & convenience store, 2 story, windowed cupola. | ||
| HI-05-02 | Pukalani | 11-2015 | N20 45.776 W156 19.633 | S. of Pukalani. HI37 (Kula Hwy) S. 4.4 miles from jct with HI377 in Pukalani, E. (turns S.) on Lower Kula Rd. 0.4 miles to the church on the W. side of the road at 4300. Church of the Holy Ghost, octagon church. | |||
| HI-05-03 | Pukalani | 11-2015 | N20 44.267 W156 19.920 | S. of Pukalani. HI37 (Kula Hwy) S. 6.5 miles from jct with HI377 in Pukalani, E. on HI377 (Kekaulike Av.) 100 yds to the house on the S. side of the road at 20. 14 sided house. | |||
| HI-05-04 | Pukalani | 11-2015 | N20 44.241 W156 19.900 | S. of Pukalani. HI37 (Kula Hwy) S. 6.5 miles from jct with HI377 in Pukalani, E. on HI377 (Kekaulike Av.) 250' to the house on the S. side of the road at 16 up a driveway 100 yds. 16 sided house. | |||
| HI-05-05 | Pukalani | 11-2015 | N20 44.559 W156 19.445 | S. of Pukalani. HI37 (Kula Hwy) S. 6.5 miles from jct with HI377 in Pukalani, NE on HI377 (Kekaulike Av.) 0.75 miles to the house on the SE side of the road up a driveway 250'. Round house. | |||
| HI-05-06 | Pukalani | 11-2015 | N20 50.004 W156 20.772 | In Pukalani. Loha St. SW 0.25 miles from jct with Old Haleakala hwy, NW on Iolani St. 0.6 miles, SW (curves S.) on Pukalani St. 0.3 miles to the house on the W. side of the road at 280. Octagon house. |