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

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

The site where hundreds of Greeks were tortured by the Nazi secret police is now a cosmetics store.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

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

The hallucinogenic center of the ancient world.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

Legend says this sacred tree was a gift from goddess Athena.

Where commuters walk through remnants of an ancient Greek necropolis.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

Gladiators once walked this ancient, subterranean passage.

This striking sculpture of Icarus honors Greece's fallen flyers.

Elaborate tile work in this railway station tells the story of Portugal.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

Modern art commemorates one of the first military actions of World War II.

These rare statues are one of the few remaining material witnesses to Old Prussian culture.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

A collection of old neon signs from all over Poland line a secluded courtyard.

Relive a Polish uprising via an enormous, century-old cyclorama.

A striking public sculpture representing the period of martial law in Communist Poland.

The silly symbol for an underground protest group is now scattered around the city.