A popular swimming hole that hides one of America's most deadly diving spots.

This museum is a full-size replica of an original church constructed during the 13th-century.

The Real LegoLand.

Wally is the 26-foot-long fiberglass emissary for Garrison, North Dakota, one of the self-proclaimed (and hotly contested) Walleye Capitals of the World.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

This snug medieval lane is one of the narrowest streets in the world.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

Something's watching you.

This folk art dinosaur was almost pushed to extinction due to lack of a building permit.

Home of a French nobleman's short-lived attempt at raising cattle in the Badlands of North Dakota.

Examine the impact of the horse on Great Plains culture through exhibits on ranching, rodeo, and the Native American way of life.

Minnesota's oldest and deepest mine is now an underground physics laboratory.

A massive sea stack famous for its appearance in The Goonies.

A Roman-style column in Oregon hides a spiral staircase inside.

The narrowest street in Canada was once a spot for dastardly doings, now a historic piece of Chinatown.

Low tide reveals 8,000-year-old rock carvings in Southern Alaska.

The historic bar where local ship captains, traders, and gold miners would come together to do business a century ago.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

The largest Walleye statue in the world calls this Minnesota town home.

Journey through the largest remaining peat bogs in the contiguous United States to see the wilderness as it once was.

"Polynesia on the Plains."