117 // "Keystone" - 1 Hour Cavern Soundfield

Listen & relax to more deep minimal atmospheric music here: Spotify: https://open.spotify.com/artist/6CUKjF2wMpVVLiHrKSshzE __________ Far beneath the surface lies Keystone, an immense cavern carved over millions of years by an ancient underground river and later shaped into one of the first true OSF sites. Its interior is so vast that early survey teams could not map its boundaries with standard lighting, and entire prototype structures were eventually built inside the chamber without ever reaching the ceiling. When the surrounding region became difficult to measure, stabilize, or build upon, Keystone was chosen as the first fixed reference point of the network: a place where distance, weight, alignment, and structural form could be tested against stone that had remained unchanged long before human construction began. Engineers preserved the cavern’s sweeping arches and water-worn geometry, not as decoration, but because the earth had already shaped a structure strong enough to outlast everything placed within it. Over time, every major OSF facility was measured against Keystone in some form, making the cavern less of a building than the hidden standard beneath them all. __________ OSF: Subscribe • https://www.youtube.com/@OBSIDIANSOUNDFIELDS Contact • https://www.instagram.com/obsidian_soundfields/ Spotify • https://open.spotify.com/artist/6CUkjF2wMpMVVlihrKSshzE ArtStation • https://www.artstation.com/obsidian_soundfields/store?tab=digital_product Fourthwall • https://obsidian-sound-fields-shop.fourthwall.com Linktree • https://linktr.ee/OBSIDIANSOUNDFIELDS Dark ambient liminal sci fi ambience with atmospheric sound design and immersive dreamscape visuals