A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A colorful architectural gem in Seattle's uniquely modern Central Library.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

The glowing blue Nymphaeum of Emperor Tiberius.

London's smallest police station is barely the size of a phone booth.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

The ancient tomb acts as a calendar that keeps perfect time.

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

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Hear the quietest sound from across the dome.

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

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Quite simply the largest tree in the world (by volume).

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Pompeii's less famous neighbor is still revealing her secrets.

Tubing through a cave lit with glowworms is a magical underground experience.

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

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

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

Museum preserving torture methods from the past.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The most visited, and possibly most controversial, museum in Germany.