A church of bones, decorated with 40,000 human skeletons.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

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

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

Climbing to the top of the cathedral's bell tower offers sweeping views of these medieval ruins.

Something's watching you.

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 statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.

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

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

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

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

A tiny church on a man-made island in the Adriatic.

Bridge that died in war and was resurected.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

Oriental bazaar in the heart of Sarajevo.

The place where World War I began.

Place with alleged mystical powers in Old Orthodox Church in Sarajevo.

This one-time health resort was used by aristocrats around the world.

A whimsical bridge adorned with decorative dragons.

The hallucinogenic center of the ancient world.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.