A floating observation deck suspended in a crystalline cavern, transparent walls revealing infinite star fields beyond, with geometric light patterns dancing across prismatic surfaces while ancient monitoring equipment hums with forgotten purpose

A derelict deep-sea research station at 4000 meters depth where the pressure doors have warped just enough to let the cold black ocean seep in — bioluminescent organisms colonizing the flooded corridors in eerie blue-green constellations, antique sonar displays still pinging into the void, waterlogged logbooks preserved behind cracked glass, and through a porthole the endless dark pressed against the station like something curious and patient.