St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

One part local history, 99 parts gruesome haunted house.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

Museum preserving torture methods from the past.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

A Mexican Romeo-and-Juliet-esque legend has given this super-narrow alleyway a reputation for romance.

Mexico's astounding mummy museum with "the world's smallest mummy."

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

Mysterious glowing orbs float through the desert night.

Along a California highway is a kind of Jurassic Park made of metal.

Version of the French Riviera destroyed by the sea.

Steel rings embedded in rock enable hikers to ascend a picturesque slot canyon in the Mojave Preserve.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

This conservation area is also home to many of the region's desert tortoises.