At 207 feet, one of the world's longest continuous escalators.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

A bit of retro transportation flair preserved in the world's largest department store.

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

Red frames showcase remnants of one of New York's original subway stations.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

Lie in a hammock where George Washington stood.

The first and only carousel with a lineup entirely of insects.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

Sniff the Titan Arum's rotting flesh.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

Now the site of a high school, this was almost the location of the largest cathedral in the US.

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

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

There are owls with glowing eyes in Herald Square.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Send a postcard while vacationing with Satan.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Art in the form of a winding, man made crack in stone.