This 15th-century island fortress later served as home to the executioners no one wanted to live near.

A sharp sculpture made of thousands of pieces of jagged glass.

Hideout of thieves, monks, and goat-footed gods.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

The reconstruction of this prominent building fulfilled a long-written command.

The oldest housing complex in Riga is a mini timeline of architectural trends.

This stunning limestone waterfall is the highest in Estonia.

Man-made mineral caves house massive bat colony.