Elysia
From Memory Alpha, the free Star Trek reference.
Elysia is a pocket dimension, congruent with the Delta Triangle region of the galaxy and governed by the Elysian Council. Its "starship graveyard" contained all of the ships lost in the Delta Triangle over the millennium preceding the arrival of the USS Enterprise. Time in Elysia passed very slowly relative to the outside universe. (TAS: "The Time Trap")
