A stretch of New Hampshire lake water is the only ice runway in the lower 48 states that is FAA-approved.

A serene plaza that commemorates one of the Granite State's most iconic figures.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

An abandoned 1930s gas station turned bustling neighborhood park.

Wild West history in Hollywood style.

The site of a classic series of Laurel and Hardy pratfalls.

Part bookstore, part café, and part forest.

Artwork celebrates the local culture in the region around the world’s youngest volcano.

Hundreds of antiquated typewriters and office machinery show the technological evolution of business.

A grotesque Fiji merman dwells within this traditional Dutch-style building.

This giant steer-skull edifice refuses to die.

A Wild West jailhouse that slid down the mountainside.

An Arizona museum with a collection of pharmaceutical oddities, including a jar of a gangster's chewed gum.

This Arkansas town is known for its gangster history, its healing waters, and now its brews.

The remains of the first public diamond mine in Arkansas.

The scant remains of an expansive indigenous civilization can be seen at this Arkansas state park.

Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

A self-built castle made by a mysterious man.

This gravelly, dangerous highway is the only road in the United States that leads to the Arctic Ocean.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

A historic freight system that found the true gold rush is in tourism.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."