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

The first declared National Monument in the United States.

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A fitting attraction for the corn capital of the world.

A true roadside icon standing on the same plains that the herds once roamed.

A monument to the center of the North American continent may be off by a few miles.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

A museum wholly devoted to juvenescence.

Eighty million natural history specimens call this gargantuan museum home.

Explore nearly 400 years of English middle-class home life.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A cluttered and astounding collection of antiquities and curiosities.

One part local history, 99 parts gruesome haunted house.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A preserved block of timber buildings from the city's industrial era in the Middle Ages.

Famously misunderstood wonder of the ancient world

Europe's largest prehistoric mound – burial site of a legendary king?

The largest stone circle in the world has ended up bringing up more questions than it has answered.

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

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.