Mysterious spherical rocks in the semi-desert of western Kazakhstan.

This Soviet-era "closed town" was a top secret uranium producer often left off of maps.

This giant, 83-year-old ship elevator is an engineering feat to behold.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

The Brutalist building harbors an unusual inverted dome that swoops down over its central sacred room.

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

The small sanctuaries lie just off the beaten path near one of Bhutan's most famous attractions.

The medieval network of canals hidden underneath the city is opened to explorers each year.

A collection of pianos and more guaranteed to delight anyone interested in music history.

Perhaps the most scandalous statue of America's first president.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

This quiet park's strange sedimentary spires were named after Kodak's color film.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

The cardinal directions, set in stone.

Dead weights honor the dead of Portugal's fishing industry.

The only diamond mine in the world where you can keep what you find.

This long-distance walking route follows the Prime Meridian line as it passes through England.

The excellent acoustics of this natural amphitheater made it a popular preaching spot for the founder of the Methodist Church.

The illuminating collection of L.A. street lights is run by the city and only opens one day per month.

It took an artist 20 years to create this sprawling sculpture garden honoring the area's ancient inhabitants.

This Manchester laundromat is hiding something.

The skeletal white beams stand as a monument to religious dissent.

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

This nine-story building can be played like an instrument.