For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

This abandoned subway station can still be seen on regular commuter trips.

One kilometer of thick brass rod laid out before your eyes.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Try not to get slimed in Tribeca.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

More gold than anywhere else, ever.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

A rare view of a preserved Victorian science museum.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Towering basalt columns, a creation of fire and ice.

Quite simply the largest tree in the world (by volume).

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

San Francisco's newly reopened hands-on science museum.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Its buzzing collection honors vibrator history.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.