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

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

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

The LSU mascot lived on the college campus in one of the most impressive tiger habitats in the country.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

A museum dedicated to the history and exploration of both popular music and science fiction.

A walk through the historic city center, under the streets of Seattle.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

A huge musical instrument played by the ocean.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A cluttered and astounding collection of antiquities and curiosities.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

270 million year-old forest of stone.

A colossal floating restaurant built to look like a ancient Chinese imperial palace.

Two cannon-like cranes were installed on top of the bank building to fend off bad feng shui.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

Climb to the top of the world's largest seated bronze Buddha.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

A shrine built to combat the bad karma of a commercial venture.

A memorial that honors the victims of a tragedy in Ukraine.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.