Five candy-colored villages on the Italian Riviera.

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

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

A forgotten "city of water" underneath the famous Trevi district.

In the upscale neighborhood of Miraflores in Lima, a pretty little park is home to dozens of cats.

A famous flea market artist's studio that's full of odds and ends.

This rusted car found in Petrified Forest National Park's Route 66 exhibit may be the most photographed abandoned car in the country.

See massive fossils that are over 200 million years old in northeastern Arizona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

An homage to everyone's favorite prehistoric cartoon family.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

Flashy signs from Las Vegas’s past find their final resting place at this unusual graveyard.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

These two monoliths have stood at the entrance to the neighborhood since the days it was called "Hollywoodland."

These four islands right offshore have waterfalls, colorful lights, fancy buildings, and a secret purpose.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.