See massive fossils that are over 200 million years old in northeastern Arizona.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Known locally as "the giant head," this 14-foot LED sculpture has a photo booth in the neck where you can have a 3D picture taken and displayed.

A bronze of the man in all his sinewy glory celebrates his longtime connection to the Ohio city.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

Come for the speed, leave in love with the desert.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Follow the steps, and this roadside artwork will teach you how to dance.

This historic train station has been converted to a locomotive themed hotel.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Is this the most Portland place ever?

10,000 flowered plants bloom in the City of Roses.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

It houses a menagerie of wondrous taxidermy specimens from around the world, including the remains of a famous gorilla.

Banksy's image of a naked man dangling from the window of a sex health clinic.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Decommissioned experimental solar facilities that pioneered solar energy technology.

The palatial McDonald's that inspired Wesley Willis.

A lush green oasis in the middle of Chicago.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

A giant Troll lurks under one of Seattle's oldest bridges.