Stepwell
A stepwell was a type of well used for irrigation in many pre-warp civilizations.

An ancient stepwell was one of the places in the holographic environment created by Doctor Issa for her son Su'Kal. At the bottom of the stepwell, Su'Kal had constructed totems in front of a double door. The door had been locked shut with chains and with a bone from a creature placed across the handles.

In 3189, an away team from the  visited the stepwell after traveling through a forest. (

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Architecture