This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Indents in the pavement are all that remain from a grisly death machine in Paris.

France's national museum of scientific and industrial instruments.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This massive library holds what was once the largest book collection in the world.

Kay Andrews's recipe was so good, her family immortalized it in stone.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

A sculpture for the sun and stars, created by Nancy Holt.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

Once a year, at exactly 11:11 a.m., this monument comes to life.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

The fading, forgotten remains of a once bright and booming factory.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Buried beneath the New Mexico sands are believed to be millions of copies of Atari's E.T. video game.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

On the side of a remote mountain, a stone face bearing an inscription of mysterious origin.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

Legends surround this jagged rock formation in the New Mexico desert.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

Eulogizing an unknown man's unusual demise.