A naturally beautiful, seemingly bottomless deep blue spring.

Something's watching you.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

The hallucinogenic center of the ancient world.

This architecturally eclectic early-20th century mosque was built as a place of worship for the Islamic followers of a Jewish messiah.

An abandoned Byzantine fortress and notorious prison.

Venice's "Island of the Mad."

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

The beautiful, ornate weather station is the most popular geocache in Salzburg.

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

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

These ruins in Volvi were once at the intersection of the Eastern and Western Worlds.

A two thousand year old brothel uncovered in Northern Greece.

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.

This Romanian village may have been drowned, but it is long from forgotten.

Rome's ancient Etruscan rival, now a park full of ruins.

A hospital where antique dolls are given new life.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The underground sanctuary of a mysterious ancient cult.

Architectureal fantasy quarter of Rome.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.