Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

The ancient latrines of the Greeks, in all their public glory.

Roman ruins, natural methane fires and a lovely beach.

Flames have been burning within this mountain for more than 2,500 years.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

California's longest-running tourist attraction is a stump.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

The medieval woodcut-style artwork chronicles life in medieval London.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Residential building on the Regents Canal is a breeding ground for creativity and innovation.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

These stained-glass windows are all that remains of a building that was the target of one of the biggest explosions in London after World War II.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A museum that chronicles the interesting and often dark history of the London docklands, once one of the major trading ports of the world.

Catacombs turned marketplace.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.