Paths are maintained, but trees have taken over plots.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Museum preserving torture methods from the past.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

Eight naturally mummified bodies in glass coffins are housed in an underground crypt.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

The palatial McDonald's that inspired Wesley Willis.

To find the "unicorns of the deep" you've got to go downstairs.

Illegal drag racing two stories beneath Chicago’s streets.

A hot dog stand where the heads are just as hot as the dogs.

These pretty kitties killed and ate as many as 135 railway workers.

A display of magnificent stained glass windows is the first exhibit of its kind.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A fitting attraction for the corn capital of the world.

Quite simply the largest tree in the world (by volume).

Hidden behind Lincoln's head is a chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

The world's longest known cave system.

This midcentury chapel is a bold architectural statement and a symbol of Indiana's Lutheran heritage.

Ancient petroglyphs discovered only after a massive fire swept across Michigan in the 1880s.

World's largest Christmas store.