Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

A tunnel with windows, so you don't miss out on the impressive views.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

The largest island on the great salt lake is home to curious creatures and strange stories.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

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

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

Bison, America's national mammal, are staging a slow comeback in Ohio's prairie parkland.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

A slab of sandstone covered with mysterious 1,000-year-old rock carvings from a vanished North American culture.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

An office built to look like a giant basket.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

Deep scars on the earth left by the Ice Age.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

Rare recess caves fill this unbelievably beautiful Ohio park.

The largest earthwork effigy in the world.

Take a drunken tour inside the world's largest known geode.

The fifth-longest natural arch in the world, and the longest outside China.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.