The fifth tallest statue in the United States is a shirtless monument to the oil worker.

Nature's biggest mammal swims in landlocked Oklahoma.

This historic folk art garden contains a nightmare tower that claims to be the world's largest concrete totem pole.

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

An underground river pushes more than 200 million gallons out of this Missouri spring every day.

These pink granite water slides are the result of millions of years of erosion.

Often referred to as the largest spring in America.

A 40-foot waterfall flows into this unique natural swimming hole.

This small turbine mill along Rocky Creek was built in 1928

One of the deepest springs in Missouri.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

An average of 33 million gallons of water pour out of the collapsed cave at the heart of this spherical spring.

A historic, scenic mill that was forced to close due to overlogging.

A version of this picturesque mill has existed since the 1800s.

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.

Three markers installed over the course of 140 years mark the point where Arkansas, Missouri, and Oklahoma converge.

An adorably sweet display of sculpted Precious Moments figurines.

A larger-than-life monument to the overlooked women who braved Western expansion and broke down societal barriers.

This unique landscape is the only place in the world to dig for hourglass-selenite crystals.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

This unusually circular centenarian barn became a Route 66 icon.

An Oklahoma museum that celebrates the history of the "Mother Road."

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

A peculiar forest that was handcrafted for government experiments.