This fantastical waterfall is hidden in a cave located in a cracked cliff.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The first hospital in the New World.

Built in 1512, the oldest cathedral in the Americas.

A military fort has guarded the surrounding area from this key position since the 13th century.

This 15th-century church houses priceless works of art from a range of Croatian artists.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

Where the lovelorn find a home for their sentimental keepsakes.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Hear the quietest sound from across the dome.

Watch the newest land on the planet form before your eyes.

This black shoreline is made up of exploded lava particles.

A symbol for the opposition to nuclear power around the world.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

A surreal statue honoring Prague's favorite literary son.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

What looks like a suicide in progress is actually a statue of Sigmund Freud.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.