Revolving door
A revolving door was a type of door that spun in a circle.

In 2365, William T. Riker found an antique revolving door on Theta VIII which led to a recreation of the setting for the novel Hotel Royale. Jean-Luc Picard, surprised by the find, told Riker to be careful. ()

In 2370, while stuck in the mirror universe, mirror  offered prime Kira Nerys access to a transporter if she gave him the ability to send people to the prime universe. Kira objected, saying she couldn't open a revolving door to her universe. ()

External link

Architecture