A Saint Nicholas-themed ghost town in the Mojave desert.

See massive fossils that are over 200 million years old in northeastern Arizona.

A reproduction of earth's many biomes.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A sharp bend in a dramatic river canyon cut through red rocks.

Most-visited and most-photographed slot canyon in the American Southwest.

The beloved beast's taxidermy remains sit in the Natural History Museum's cafe.

Its collection includes a broad array of social, geographic, graphic design, and political history.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

The commemorative stone column conceals a secret laboratory.

A wonderfully eclectic Victorian aquarium lies in the basement of the Horniman Museum.

An architectural oddity hides in plain sight on this iconic London bridge.

A measuring mishap led to these artificial stone ladies losing their stomachs.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

A unique tribute to the millions of animals who served and died for the British military.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

A quiet memorial to those who died saving others in the heart of the City of London.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.