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

One man's ambition created this psychedelic log home.

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

A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

A fitting attraction for the corn capital of the world.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Just a man taking his prehistoric pet for a stroll.

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

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

This restored 18th-century house was once the home of Lititz's first tobacconist.

A fascinating community art piece created by students, teachers, and noted Philadelphia artist Isaiah Zagar.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

"Where the ducks walk on fish."

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

A local prank turned town icon.

A historic covered bridge is but one example of an oddly prevalent American urban legend.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.