A memorial to the monk who set himself on fire to protest the persecution of Buddhists in Vietnam.

A city block packed with whimsical sculptures that seem to be plucked from a tiled fantasy world.

World's largest bell sits on the grounds of the Kremlin in Moscow.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

A tiny park in the middle of some big power politics.

Large miniature theme park with 100-plus models.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

A sixth-century Byzantine cistern hidden below a modern carpet store.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

This burial mound is said to be the final resting place of Russia's first Viking ruler, Oleg of Novogrod.

A statue of the Soviet leader still stands in a quiet corner of Estonia’s most Russian city.

A unique sculpture calls the outside of this steakhouse home.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

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

Some believe that the artist behind this whimsical statue inserted his own likeness as a way to discreetly flip the bird.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

A swath of France so devastated by war it is still forbidden to go there.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

A relic of World War I that now exist as a piece of public art.

This memorial to a murdered empress took 20 years to design, then spent 30 years hidden away in storage.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.