Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

A striking Soviet memorial commemorates the liberation of Belarus from the Nazis.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

More than five miles of underground passageways.

Live long and prosper in Tennessee.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

Storybook cottage in Beverly Hills was once the site of 1920s silent film studio, affectionately known as "The Witch's House."

The sun acts as a key that only fits this giant keyhole twice a year.

The remains of a doomed Antarctic plane, buried beneath layers of ice and snow, await those willing to do a bit of digging.

No matter what it might seem like on film, most scenes filmed on a plane are filmed at this LA studio.

This artificial archipelago was supposed to resemble a map of the world.

Visit this church that's shaped like a giant glass pump either to cater to women or to reference a tragic local tale. Or both.

The world's largest wooden trestle stretches across this desert canyon in Anza-Borrego Desert State Park.

This impressive tunnel was dug entirely by hand over the course of 36 years.

Two World War II aircraft lie within the jungle around this abandoned runway.

This monster board rode a monster wave to break two world records.

One of the largest helium balloons in the U.S. is a 112-foot ginormous orange.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.