A beautiful but toxic fountain of mercury.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

A temple to modernity, tucked away amid Barcelona's more well known museums.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

World's strongest whirlpool.

Walk behind a 50-meter-high waterfall.

The convergence of two currents makes this a surprisingly pleasant getaway in the Arctic Circle.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

Walk 2,300 feet above the ground on the "Troll's Tongue."

A serpentine highway twists and turns over the treacherous Norwegian Sea.

This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

Things aren't quite what they seem at this mind-bending museum.

The widest waterfall in Europe is a natural wonder and one of the only places where fish are caught in the air.

A massive natural rock arch gives the Tuscan mountain its own window to the sky.

This Italian dam is covered in salt-hungry goats who manage to scale its almost vertical face.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

Giant, pink stuffed rabbit on an Italian mountain.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

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

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Geothermal waterfalls in Tuscany.

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