The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

A lovely hidden waterfall right off the highway is well worth a stop.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

A bizarre house filled with an astounding array of collections.

Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

Secret hideaway for an alternative beach experience.

The literary king of the Jazz Age was born in this lovely Minnesota home which still honors his legacy.

The Midwest's reigning king of surplus stores is full of nothing you need and everything you want.

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

More than 21,000 images fill this overlooked gem of a prehistoric site.

This quirky outpost and gallery inside a former church is an unexpected trove of handcrafted art.

Steep canyon walls hide a forested oasis in the West Texas desert.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

The fifth-longest natural arch in the world, and the longest outside China.

A ghost town that held steady longer than most, but finally gave up the ghost.

This ghost town was once a cult-like religious utopian settlement.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.