From carts to cars, this leftover Roman bridge in France has managed to survive for centuries.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The ancient tomb acts as a calendar that keeps perfect time.

The largest earthwork effigy in the world.

An ancient iron pillar in Delhi that seems to be rustproof.

This plaza at the end of the world teems with monumental tributes to a problematic history, and laser discs.

A perfect circle of 24 mysterious holes dates back to prehistoric times.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

The longest living non-clonal organisms on Earth.

Europe’s oldest natural human mummy.

Native Americans built this circle of stones, which was used to predict astronomical events.

The closest thing to Mars on Earth.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

One thousand trees were planted in Norway to be used to print books a century from now.

Constantly maintained, this organ is playing a six-century long composition by John Cage.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

A modern mechanical planetary system, part of a 10,000 year clock.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

The world's first time capsule lies behind a welded steel door in Atlanta.

Their motto is, "We've been bonkers for hats even longer than you have!"

A collection of 1,300 accordions of all shapes and sizes displayed in chronological order.

An abandoned bus station transformed into a museum dedicated to the history of Greyhound Lines, in the place where it all began.