Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Massive volcano in the Andes is the farthest point from earth's center.

Pilgrimage site for star-crossed lovers.

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

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

This massive underground salt mine now holds a sci-fi theme park in its depths.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

Romania's triumphal arch looks out over Bucharest.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.