Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

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.

This open air archeological site houses almost as much wildlife as it does classical religious artifacts.

One of the most photographed locations in the entire city.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Ship-sized kinetic sculptural fantasy.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Hear the quietest sound from across the dome.

A cluttered and astounding collection of antiquities and curiosities.

A pre-war mansion that survived the modernization of Athens.

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.

Luminaries of all stripes have sipped strong Greek coffee at this cafe since 1839.

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

This post-Ottoman era church in Athens was built by locals to serve the residents of Anafiotica

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

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

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

This slumbering beast honors the Bavarian soldiers who died in Greece during a 19th-century typhoid outbreak.