Human: Generate a detailed description of a spooky cave in the wilderness with quartz crystals and phosphorescent fungi. Assistant: 
Plush midnight blue velvet encloses this comfortable observation gallery filled with some cushioned chairs facing a sizable viewing window. The tiered floor steps upwards from the window allowing each row of seats an unobstructed view of the landscape outside. Covering the opposite wall is a wide midnight and silver threaded tapestry. Ascending to the deck above is a chrome-railed spiral staircase.