Dine amidst exotic plants at this former royal greenhouse.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The beautiful baroque library of the Hapsburg empire.

This 200-meter-high waterfall marks the site of Achilles’ immortal baptism at the mouth of the River Styx.

The largest fountain in Bratislava.

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

A striking, modern church devoted to a nun who loved God and beer.

This renaissance château was home to an infamous witch hunter who sent a hundred suspected witches to their deaths.

The sanctuary holds what was once believed to be the saint's incorruptible tongue.

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

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

The only building in Louisville (hopefully) that contains two ancient holy skeletons.

This fortress was built using the last surviving stones from the Lighthouse of Alexandria, one of the Seven Wonders of the Ancient World.

The lost library of Alexandria, revived as a spearhead of cultural preservation.

Slum Settlement Filled With Mountains of Garbage.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

This limestone outcropping was once a ceremonial site for ancient Native Americans.

A public urinal so pretty, it was declared a national monument.

The attic of a four-century-old canal house hides a clandestine church.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

A 130-year-old urinal is the oldest of Stockholm and perhaps all of Sweden.