An oil baron's wild paradise and the winner of an ill-fated air race.

Where hills of dirt conceal the burial ground of one of the most powerful ancient Native American societies.

Nature's biggest mammal swims in landlocked Oklahoma.

Sitting in the arguable birthplace of the Wild West, this museum holds the largest collection of bronco busting bric-a-brac in the world.

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

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

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

These massive mitts are made of 30 tons of devotional bronze.

An acoustic anomaly with a mysterious cause.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.