Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

Perhaps the most beautiful of preserved saints, with a little help from Paris.

Extensive Orthodox icon collection in Andorra.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Famously misunderstood wonder of the ancient world

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

A former major munitions plant that has been converted into a sprawling art space.

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

This small pedestal marks the spot of the first lot of land sold in Alexandria, Virginia in 1749.

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

A monument stands at one of the starting lines of the Trans-Canada Highway, formerly the longest uninterrupted highway in the world.

From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

On the edge of this small Washington Park, a piece of the Earth's mantle has come to the surface.

A museum dedicated to an elusive cryptid.

The highest point in Washington state is a volcano covered in glaciers.

Train debris from the deadliest avalanche in United States history can still be found in the ravine where so many perished.

The longest spit in the United States ends at a lighthouse in the Strait of Juan de Fuca.

The second tallest railway trestle bridge in America.

Sleep beneath the big screen at this old-school movie theater.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.