The oldest surviving synagogue in New York City is now a soaring art space.

Nikola Tesla's former home contains an homage hidden from plain sight.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.