This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

They squeal, they nosh, they look like predators.

More than 21,000 images fill this overlooked gem of a prehistoric site.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Look closely and you’ll notice that the color changes a third of the way up the tower.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Victorian-era Egyptomania left its mark on this Nashville landmark.

A wall of chewing gum moonlights as collective art.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

This super steep hike ascends 2,000 feet in less than a mile.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

The walls and streets of the ancient city are peppered with penises.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

A lover's walk between hilltop towns, decorated with graffiti love notes.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

This demon atop the Notre-Dame de Paris looks utterly bored.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

The final resting place of the great navigator, or maybe his brother.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

A contemporary art installation housed within a Gothic cathedral.