This is London's smallest listed building.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

A jumble of concrete on the corner of one of London’s terraced buildings is actually a work of art.

Soon after its unveiling, this giant inverted globe sparked controversy and was vandalized.

A haunting monument dedicated to the Royal Naval Air Service and the Fleet Air Arm.

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

The site where the summer solstice helped ancient Greeks sync the lunar and solar calendars.

Rest stops along this pathway offer some of the best views of the Acropolis of Athens.

These caves secretly held national treasures during World War II.

This Byzantine Church was moved from Paris to Athens block by block.

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

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

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

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

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

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

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

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

Savor sheep milk yogurt at the last of Athens' dairy bars.

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

The remains of a military communications outpost still stand on this Greek island.

After being destroyed by two separate fires, this monastery is now home to a small zoo and relics from dozens of saints.

This Buddhist temple is home to the graves of the Japanese national legends, the 47 Ronin.

A cocktail lounge decorated like an American dive bar, in honor of the legendary author Ernest Hemingway.