A concrete block embedded with thousands of pulled teeth was created by a local dentist to memorialize his dog.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

Curious rock formations in a tiny Kansas state park.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

A mysterious light of unknown origin on the backroads of Missouri.

The world's only museum devoted solely to the art and collection of action figures.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

Celebrate the history of the rich and truly misunderstood relationship between man and pigeon.

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.

This black shoreline is made up of exploded lava particles.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

What appears to be an ancient Roman temple is actually a Catholic church.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

Constructed on the ruins of a convent, this tower saved countless lives.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Less a museum than a bizarre fantasy world created by artists and engineers.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

A fascinating collection of art made from petrified wood and fossils by two octogenarian twin brothers.

World's second largest particle accelerator, where nature reveals its secrets.

A science teacher's dream.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

These pretty kitties killed and ate as many as 135 railway workers.