The most powerful waterfall in all of Europe.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

A sulfuric martian landscape that looks far better than it smells.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

A real-life homage to the Rachel McAdams and Will Ferrell's fictional Eurovision musical duo.

A public work of art that also provides some relief from the summer heat.

One of the world's tallest flagpoles.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Once the private home of China’s most legendary tycoon, getting inside this stunning mansion no longer requires an elite pedigree or acts of daring.

With over 10,000 lights, this engineering marvel lights up the city after dark.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."

The decaying remains of a once-luxurious Soviet spa town.

The cave holds a spectacular array of stalactites and stalagmites, including one shaped like a giant human heart.

Fast food feels like fine dining at this award-winning modern Georgian building.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A tiny church on a man-made island in the Adriatic.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

A remote hilltop covered in giant monoliths haunts the Brittany countryside.

The fountain marks the area where hundreds of accused witches were burned at the stake.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

This sculpture commemorates Edinburgh's sister city and their respective celebrity dogs.