Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.

A cemetery housing wild west legends in South Dakota.

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

Mining caused an asbestos emergency in this small town.

An entire town preserved as a historic landmark.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

This rustic old building is said to be the most photographed barn in America.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

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.

A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

Native Americans built this circle of stones, which was used to predict astronomical events.

A trading post in the North Pole where children send letters.

North America's first frozen mummified remains of an ice age steppe bison, the 36,000 year-old mummy named "Blue Babe."

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

A hand-built folk art installation covered with messages of God's love.

The ghostly remains of an accidental sea.

Standing guard on top of an old, vacant ice cream shop.

Mussolini gave Cincinnati a bronze statue of Romulus and Remus suckling at a wolf's teats.