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. According to some of its inhabitants, "Elysia is, in many respects, a perfect society. But with all its virtues, it is not home. And home, with all its faults, is where we prefer to be." (TAS: "The Time Trap")