Ride the subways of yesteryear.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

Here be dragons.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

Unique antiquarian shop specializing in globes, maps, and prints.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

Elevated freight railway turned wildly successful urban park.

A monument commemorating the discoverer of radio astronomy.

On the Hudson resides one of the largest clocks in the world.

Seven golden statues rise into the sky from sculptor Victor Victori's New Jersey front lawn.

The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

A completely round house designed for the Atomic Age.

A world-class collection of mechanical musical instruments and automata.

This unassuming retro burger joint was billed as “diner of the future” at the 1939 World's Fair.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

This Great Depression-era creation was once known as the strangest house in the world.

The site of one of history's most indelible and horrific tragedies.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

These mystical miniature houses bring a touch of magic to the New Jersey woods.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.