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.

The park is home to the United States's only still-operating Dutch windmill.

An architect's childhood fantasy treehouse made real.

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

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

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

European castle ruins in an American state park are actually the product of death and grief.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

Some of the oldest exposed rock formations in the United States.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

First known as the "Sample House," this construction mash-up was meant to be a living catalogue of building styles.

One of the last remaining French Colonial style churches, this centuries-old building was constructed using upright logs and no nails.

A collection of soda memorabilia that spans decades.

The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.

Carved faces add a touch of magic to this island's impressive oak trees.

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

Georgia's first brewery is also one of its oldest surviving buildings.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.