Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

One of the world’s most colorful cemeteries, where each pigment is symbolic.

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

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

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

Slyly buy a shake in the Parker Meridien lobby.

Elevated freight railway turned wildly successful urban park.

New York City's smallest piece of private property.

The best way to get a sneak peek at the movies.

An artist's cute bronze subway sculptures belie his violent artistic past.

An extensive collection of fine art devoted to man's best friend.

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

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

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

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

This rusted shipwreck directly in front of a century-old abandoned lighthouse looks almost surreal.

Once living up to its name as the grandest hotel in all of Africa, the Grande Hotel is now home to a community of squatters.

When humans abandoned this safari lodge, the lions took over.

From neon green watering holes to bleached elephant foetuses, this Mozambique museum makes natural history weird.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

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

The remains of a 19th century spring, and the site of an infamous unsolved murder.