| Name | Three Gems |
| Address | 50 Hagiwara Tea Garden Dr, San Francisco, California, 94118, United States |
| Date | 0000-00-00 |
| Time | 00:00:00 |
| Category | unknown |
| Description | A hidden subterranean installation offers a view of the sky.... |
| Coordinates | 37.77120, -122.46970 |
| Web address | /places/three-gems |