The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

The overgrown remains of an old rail bridge rise above the valley like ancient Greek ruins.

This whimsical park encourages its visitors and wildlife to roam on and around the various works of art.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

The lynching and burial site of America's first train robbers.

A lesser-known part of the Kinsey Institute is this impressive collection of art, artifacts, and material culture related to human sexuality.

One of the largest collections of merchandise from the famous British sci-fi show can be found smack in the middle of Indiana.

This mysterious hill seems to pull objects uphill.

The first spinning jail built in the United States is the only one that still turns.

Purdue students would lean over this iron fence to skirt campus rules against smoking and courting.

Historians and hobbyists head to this former French outpost for the annual Feast of the Hunters' Moon.

This shop is named for a runaway elephant who smashed through its doors, stole some peanuts, and spent five days on the lam.

Indiana's oldest sternwheel paddleboat has been plying the placid waters of Webster Lake for 90 years.

Ohio's 19th-century communist micro-society.

The Uros people live on floating reed islands in lake Titicaca.

Deep scars on the earth left by the Ice Age.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

The angel of death appears to weep black tears at this grave marker.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The only presidential monument to display a late POTUS's actual casket.

Acres of English cottage gardens, unexpectedly nestled in a Cleveland suburb.