3. Bergen Street
In Brooklyn, an abandoned level below the Bergen Street station is a favorite spot for urban explorers, one of many New York City subway stations that have abandoned platforms. Renovations to the station, which serves the F and G trains, in the early 1990s damaged the lower platform, which had been used from time to time over the course of the station’s existence since 1933. Silver doors on the upper level conceal open staircases that go down to the lower level.