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

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

Home of the International Space Hall of Fame.

This sanguine boulevard was named after a deadly cowboy bar fight.

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

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

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

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

The first declared National Monument in the United States.

Home to the deepest rift anywhere on Earth.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

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

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

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

Steadily reminding Czechia of its past.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

A saintly relic hidden in a Prague church basement.

Macabre astrological automaton clock dating to the late 1400s.

A mocking tribute to the past and modern leadership of Prague.

A church of bones, decorated with 40,000 human skeletons.