Both the World War II Allied Forces and NATO have used this modern bunker underneath Malta’s capital.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

Historic medieval fortified city in southwest France.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

This garage is frozen in the late 1990s, full of rare and untouched cars and motorcycles.

This tiny cafe is one of the last meeting places of its kind, allowing revolutionaries a place to plot.

Thousands of flamingos and other bird species flourish in these Camargue wetlands.

This ancient theater was once the home of fierce gladiatorial battles.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

Five miles of underground river link lake to ocean.

The eclectic seaside sanctuary caters to a rather fowl crowd.

These temples are among the oldest free-standing stone buildings in the world.

This subterranean necropolis holds three floors of antler-dug grave caves.

The world's most active stratovolcano is almost always erupting.

142 ceramic steps become a mosaic once a year.

Believed to be the only Orthodox church in the world that features a free-standing pulpit.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

London's amazing modernist public square that never was.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

A sculpture serving as an homage to Pope John Paul II.