A natural gas leak provides a flickering flame beneath a waterfall.

An eerie diorama that captures the majestic nature of a few prehistoric-looking beasts.

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

This poignant display is now a memorial to these regionally extinct species.

This taxidermy scene brings the struggle for survival in the Indian jungle to a quiet corner of a Manhattan museum.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

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

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

Visit the monolithic tomb of America's most famous general.

Lie in a hammock where George Washington stood.

Ride the subways of yesteryear.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Alexander Hamilton’s creation caused quite a bit of controversy.

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

Yo, Adrian!

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

A collection of artifacts from Maryland's maritime past.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.