Claims to be the "World's Highest Hill."

A half-size replica of the World Trade Center towers above Tulsa.

This highway overpass was named after the tragic disappearance of a young mother who got mixed up with the wrong people.

The highest point in Oklahoma used to be a lawless outlaw's paradise.

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

This little slice of old Jerusalem in Oklahoma is the evolution of a 90 year old passion play.

A detached cement mixer has been transformed to resemble a relic from some obscure NASA mission to Oklahoma.

Standing at 21-feet tall, this space cowboy adds to the legacy of Route 66's muffler men.

This abandoned, windowless concrete block is one of the strangest buildings in Tulsa.

One believer transformed a local curiosity into proof of Vikings on the Great Plains.

This former mining town was named the most toxic town in America.

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

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

Nature's biggest mammal swims in landlocked Oklahoma.

An acoustic anomaly with a mysterious cause.

Two hula hoops appeared on the tree after a storm, and the collection kept growing.

How did the 110-foot limestone statue cross the road?

The highest point in Iowa, while not that impressive to mountain states, has earned its own monuments.

Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

While there are no actual snakes in the history of this crooked road, there may be a number of dead horses.

The World's Largest Bull.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

A floating museum that was sunk by a flood and left to rot in the tides.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.