A park where you can watch the highway zoom past.

The longest navigable underground river in the United States is home to countless blind and albino animals.

The chiseled jaw of this forgotten American hero still stands tall in a small Indiana town.

Symbolic attempt to overcome the issues of life.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

Erosion and time have created a naturally-formed water park.

Giant granite rocks standing end-to-end like a train of circus elephants.

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

Rusted and decayed, this former mining site is a portal to the past.

Once a giant oak that served as the region's post office.

From a canyon-like gorge, more than 20 million gallons of water emerge every day, while a smaller spring drips down, creating the illusion of an endless, gentle waterfall.

Once an ancient sea, this landscape of rocky ravines is filled with the fossils of ancient marine life.

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

This large chunk of dark rock is a relic from an ancient volcanic eruption.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A relic of the region's once booming timber industry.

The art studio of an early 20th-century painter, hidden amid the Great Smoky Mountains.

Despite being a perfectly pleasant place to be, Loyalton can't seem to attract any visitors.

The viewpoint for this attractive, off-the-beaten-path waterfall is reached by a paved, wheelchair-accessible trail.

A frozen oasis lies beneath the scorching New Mexico desert.

This Indianapolis landmark offers a secret panoramic view of the city. 

Where hikers on the Tecumseh Trail can exchange a dirty sock for a free geode.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.