The world's largest neutrino telescope searches for secrets of the universe at the South Pole.

The largest piece of no man's land left on Earth.

Fascination continues to surround one of history's most infamous shipwrecks.

Final remnants of the 1895 Cotton States and International Exposition.

Unruly residents were housed in this one-person cell until the Black Maria arrived.

This pair of centuries-old magnolia trees was once struck by a Babe Ruth home run.

The only subterranean ping pong table in Atlanta.

This twisty sign depicts the chain's first logo.

A replica of where the Last Supper was held.

The wooden house where the jazz great learned to play the piano.

A cult archaeology conspiracy theory claims these West Virginia petroglyphs were written by Irish monks in Ogham.

A historic coal mine that doubles as a museum and tourist attraction.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

One of the last few period-correct, hand-operated canal locks in the country.

A slab of sandstone covered with mysterious 1,000-year-old rock carvings from a vanished North American culture.

A rare particle accelerator with a tremendous energy range is tucked away at Ohio University.

This garden memorial marks the site where 12-year-old Tamir Rice was fatally shot by the Cleveland Police Department.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

This NASA test station is home to some of the world’s largest and most powerful space environment simulation facilities.

This marker identifies the location where three states converge.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

A memorial for an outsider theorist who believed that the planet is actually hollow.

This unincorporated community in western Ohio got its peculiar name from John "Daddy" Baker.

The entrance to this sinisterly named tunnel hides behind a Tim Hortons.