Ancient petroglyphs discovered only after a massive fire swept across Michigan in the 1880s.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

Astounding collection of coin-operated games and automata.

This freshwater spring fills with 10,000 gallons of water per minute.

Turnip-shaped island just off the Michigan shore in Lake Huron.

On the side of a remote mountain, a stone face bearing an inscription of mysterious origin.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A museum devoted entirely to the rattlesnakes and snake-related art.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

These aggressively sustainable art homes look like something out of 1970's science fiction.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

The largest self-built castle in the U.S., six decades in the making.

When ecosystems collide in the arid Southwest.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.