Longest fortress system anywhere in Europe.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

An apparition of Virgin Mary in Herzegovina.

Bridge that died in war and was resurected.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

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

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

One of the world's steepest streets seems to have houses sliding down it.

Hundreds of bras, blowing in the wind.

New Zealand's epic shrine to all things puzzling.

Highly spherical boulders on the shores of New Zealand.

The premier place to experience the Victorian imagining of the steam-powered future.

A perfect turquoise lake colored with glacier dust.

The glacier tucked within a New Zealand rainforest.

This strange geological landscape erupts with sudden bursts of water.

The platform atop this verdant volcano was built with the help of a royal elephant.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

Tubing through a cave lit with glowworms is a magical underground experience.

This unusual rock formation looks like an apple that has been neatly sliced in half.

Taihape's claim to fame is a fictional Kiwi farmer wearing gumboots.

The world's only complete colossal squid specimen is on display at the Te Papa Museum.

New Zealand's only running funicular railway.

A tiny museum in Esperance, Australia, displays a bunch of space debris from NASA’s Skylab.

Alien rock formations grown from the sands of an Australian national park.