Only open for two days a year, this church links ancient Greek and modern Christian celebrations.

According to legend, this cavern holds the passage that Persephone used to travel to and from the underworld.

According to legend, this ancient column contains healing properties.

When construction began on this hotel, developers were surprised to find the ruins of an ancient civilization.

A former military hospital is now used to study and preserve artifacts of the Acropolis.

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

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.

These caves secretly held national treasures during World War II.

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

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

Where commuters walk through remnants of an ancient Greek necropolis.

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

This building displays the scars of the “Dekemvriana,” a dark time in modern Greek history.

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

An ancient Greek monument and a Byzantine church coexist inside this cave.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This ancient statue of Dionysus lies unfinished and abandoned in one of Greece's oldest quarries.

Interactive museum complete with costumed re-enactors and the only known surviving chest from the Boston Tea Party.

This hike brings visitors closer to Taipei 101, once the world’s tallest building, than any other trail.

This small museum once served as a royal hunting pavilion for King Otto Friedrich Ludwig.

One of the largest objects salvaged from the famous sunken passenger ship.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

The largest statue of this convex, homogeneous object with just one stable and one unstable equilibrium point.