Read between the lines of the subway map to find the hidden abandoned Civil War fort.

Sniff the Titan Arum's rotting flesh.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Thriving meadows span a rooftop in one of Brooklyn's most heavily industrialized neighborhoods.

An exhibition space dedicated to American outsider art created between the 18th and 21st centuries.

A group dedicated to promoting boating, kayaking and environmental education programs.

Nondescript elevator doors open to reveal a stunning, surreal world.

This theater opened in 1998, but both the building and the puppeteers who perform there have a distinguished history.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

This Upper East Side apartment co-op was designed as a tuberculosis sanitarium.