The remains of an ancient Roman city are hidden underneath Bologna's beautiful public library.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

The topiary maze at the Habsburg hunting lodge.

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

The final resting place to 300 Victorian-era pets hides inside the city park.

A surreal statue honoring Prague's favorite literary son.

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

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.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Sniff the Titan Arum's rotting flesh.

The "Seinfeld" diner.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Elevated freight railway turned wildly successful urban park.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

Crushed coral and crystals give the sand its signature coloration.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

Pilgrimage site for star-crossed lovers.

Five candy-colored villages on the Italian Riviera.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

Pompeii's less famous neighbor is still revealing her secrets.