This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

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

Rome's semi-secret peephole vista is also a former Crusader stronghold.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Architectureal fantasy quarter of Rome.

This futuristic building is yet another architectural wonder in Dubai.

This living legend of maritime history is enjoying a second life.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

This indoor ski resort has a mountain contained inside a mall.

Billed as the "largest natural flower garden in the world" this Middle Eastern show field has little competition at 45 million flowers.

This artificial archipelago was supposed to resemble a map of the world.

A stretch of the Iwai River that features beautiful rocky cliffs, rapids, and flying dango.

It's said the devil used this mushroom rock as a table for a late-night meal.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

It took millions of years for these rocks to resemble their mammalian counterparts.

A beautiful red-faced slot canyon in northern New Mexico.

Named after an outlaw who used the basin as a hideout.

Rock-cut caves and 7,000 Buddhist sculptures carved into the nearly sheer face of a sandstone mountain.

350-foot-high emperor faces in China's Yellow River valley.

A harrowing trail up a mile-high mountain.

Snow-capped peaks, colorful waterfalls and stunning vistas on the edge of the Himalayas.

A tunnel dug through the side of a mountain by hand provides convenient yet death-defying access to a small village in China.

One of the world's largest malls has been almost completely empty since its opening.