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

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Storage warehouse of the rich and famous.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

A small piece of the composer's New York home lives on in the center of Czech culture in Manhattan.

A celebration of capitalism in Midtown.

An accidentally hidden library containing the ephemeral history of New York.

Creating this diorama spurred naturalist Carl Akeley to begin advocating to protect the apes.

Here be dragons.

Recovered suit of a cannibalistic West African gang.

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

This colorful overpass is one of Bhutan's longest suspension bridges.

What was once the longest suspension bridge in Latin America was directly inspired by the iconic Brooklyn Bridge.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

This 15-foot tall obelisk commemorating the Philadelphia-Baltimore railroad connection sat neglected for over a century.

This unique structure is the only one of its kind in Virginia.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

An industrial waste tourist attraction.

A long abandoned hospital building on the outskirts of NYC.

The first dish to bounce radio signals off the Moon, it was the forerunner to the U.S. Space Program.

The greatest real estate coup of all time.