Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

The largest man-made crater in the U.S. marks the spot where we once tested mining with nukes.

A winding, cliffside stretch of road overlooking the Delaware River.

Landmark dedicated to the plight of the American Indian in the 21st century.

This beautiful vintage movie palace has seen little change in form or function since the 1920s.

This grand stone tower was dedicated to a famed American humorist almost by coincidence.

Like Mars, but much closer.

A fitting attraction for the corn capital of the world.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

Feral cats keeping the rodent population at bay all across Greenpoint waterfront.

Former utopian colony based on the belief that the universe exists in a hollow sphere.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

Unique Michigan homes look like something out of Tolkien's "The Lord of the Rings."

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

This little valley along Highway 1 is engulfed by thousands of lilies during the spring season.

This sandstone mansion was the home of two of Oregon's most important pioneers.

This lavish room at NYC's French Embassy is a rare relic from the end of the Gilded Age.

The Old Mill shown in the opening credits of “Gone With the Wind” is actually fairly new, and was never a mill at all.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.