This Quebec estate is home to the elaborate gardens of a self-taught horticulturist.

An ever-changing gathering of crude wooden figures haunts the St. Lawrence River.

A mysterious spot where the laws of gravity seem not to apply.

A school teacher's massive and terrifying self-built castle.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

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

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

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

Legends surround this jagged rock formation in the New Mexico desert.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

This rare volcano spews the strangest and (literally) coolest lava in the world.

This slowly crumbling mansion was home to one of East Africa's richest and most powerful slave traders.