Bangor Dome is a location in Chrono Trigger that appears in 2300 AD. Crono gets there through a portal from 1000 AD. It is completely deserted save for the gate to the present and a sealed door. Behind the sealed door, there is a room with bad ventilation and three chests. Within the chests, there are the following items: an Alluring Top, Full Ether, and a Workman's Wallet.
It also happens to be how the party first gets to the Future, when they are running from the Chancellor in the present.