The oldest still-existing mosque in the United States sits in a remote prairie in North Dakota.

The vertical-axis windmills of ancient Persia have been grinding flour for 1,000 years and counting.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

On East Burnside, a 24-hour vending machine distributes world-class pastries.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

This lonely memorial marks the supposedly haunted site of a brutal 19th-century murder.

This sprawling taxidermy collection celebrates the art and history of sport hunting.

The Hudson River School comes alive at this palatial estate.

The first evidence of some of the Earth's earliest life was found in this fossilized undersea grotto.

A monument to the military service of America's greatest traitor refuses to even name him.

This locally-famous crevasse in New York State is icy all year round.

This giant monument of the RCA mascot is a beloved fixture in Albany, New York.

A terrific purveyor of natural history objects and curios.

The author of Uncle Tom's Cabin was neighbors with Mark Twain while living in this Connecticut home.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

The site of the first "historically true" UFO encounter in the U.S.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.