caves
From Trekipedia
Caves were enclosed, underground areas. While some were very small, others were enormous. One cave system on Exo III featured a chasm so deep that it was described as "bottomless." Caves were often filled with stalactites and stalagmites.[1]
Notes and References
- ↑ Roddenberry, Gene (Executive Producer). "What Are Little Girls Made Of?". Star Trek, season 1, episode 7 (Production number 10). Directed by James Goldstone. Written by Robert Bloch. Desilu Productions. 20 October 1966.