Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

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

Half of a waterfall goes into the river while the other half seems to disappear.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

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

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The world's longest known cave system.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The beautiful baroque library of the Hapsburg empire.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The first declared National Monument in the United States.

The fairy tale castle of the "fairy-tale king."

The celebrated eyesore created by starry-eyed sweethearts.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The former sign of this immortal music venue is just that--undying.

The most confusing clock in New York.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

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

A saintly relic hidden in a Prague church basement.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.