|The following is based on developer test content cut from Fallout 3 and has not been confirmed by canon sources.|
RandomEncounters (named Enable Mrkrs -Rndm Enctrs on the local map) is a test cell in the game files of Fallout 3.
It appears to be a spawning room for characters to random encounters. In the middle of the room is a gene projector.
RandomEncounters appears in the game files of Fallout 3 but should not be considered canon due to it being a test cell.