This interactive gallery makes you feel like you've stepped into a fantasy world filled with whimsical monsters.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

This preserved wilderness hides the remains of a colonial grain mill used to feed George Washington's troops.

This mysterious marker puzzles pedestrians and infuriates geographers.

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

A retired subway car stands alone in a field in the middle of Queens.

A century-old magnolia tree is the only living landmark tree in New York City.

This miniature village stays behind in the Breuer Building, even as the museums around it come and go.

This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

On the hills of Bay Ridge stands a house straight out of a fairy tale.

This unusual apartment building may be Brooklyn's own version of the Leaning Tower of Pisa.

This eclectic sculpture garden in Brooklyn, home to a bizarre collection of art, was once a run-down junkyard.

This former water source for the City of Brooklyn is now a thriving natural wetland.

One of the remaining markers of an era when Brooklyn and Flatbush were separate cities.

Amid skyscrapers and traffic exists this unique aquatic ecosystem.

A series of fish plaques that are embedded in the malls of Ocean Parkway.

The only gallery in New York dedicated to olfactory art and the exploration of scent in art.

Though the case is scorched and the buttons half-melted, this hardy handheld gaming device can still run a game of Tetris.

What was once a vast naval cemetery is now home to nesting birds and pollinating bees.

Now owned by the National Park Service, this location was once home to illegal boxing matches.

Home to a dizzying array of letterpress blocks with a rich history.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.