An ancient octagonal weather station named for the eight Greek gods of wind.

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.

These caves secretly held national treasures during World War II.

A Byzantine-era church hidden in a wooded area below the Acropolis.

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

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

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

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

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

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

One of the largest single-span stone-arch bridges in the Balkans looks like something straight out of a fairytale.

This Greek Orthodox church houses the mummified body of St. Spyridon.

Ancient Greek oracle of the dead.

The ruins of this monumental city founded by the first Roman Emperor are strangely overlooked by most travelers.

The hallucinogenic center of the ancient world.

This legendary city has been a tourist attraction for centuries.

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.

Designed by Maya Lin, the memorial honors 41 individuals who died fighting for equal rights between 1954 and 1968.

The country music legend's grave is surrounded by Astroturf because fans kept plucking out the grass.

One of almost 200 confirmed impact craters in the entire world, untouched for tens of millions of years.

This 600-year-old home seems to defy physics.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.