This Ottoman-era church is hidden amid a busy tourist area.

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

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

These ancient ruins hide in plain sight next to a dessert shop.

There are many Byzantine-era churches still standing in Athens, but this is the only one with a 2,500-year-old column rising through its roof.

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

A historic building houses one of the most important archaeological institutes in Europe.

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

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

This beehive tomb built for royalty sat hidden for over 3,000 years.

What once sat in the world’s spotlight is today a largely disused ghost complex.

A tiny Greek Orthodox church from the Ottoman era hides on a busy city street.

This graffitied 19th-century building was a prototype of European industrial architecture.

Built by the Ancient Greeks, this chariot bridge is still in use today.

The hallucinogenic center of the ancient world.

This 200-meter-high waterfall marks the site of Achilles’s immortal baptism at the mouth of the River Styx.

A solemn reminder of the infamous World War II war crime that massacred almost all the men in a small Greek town.

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

These sea caves are the source of Xigia Beach's distinct aroma.

An islet filled with wooden houses where the open sea meets a lagoon.

Hundreds of notes give thanks to the patron saint of lost causes.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

This ordinary street was made infamous by a legendary visit from the devil.