This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

The most powerful waterfall in all of Europe.

This elegant arc of a waterfall marks a religious turning point.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

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

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

Rising from the sea like a stone monster.

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

This amazing medieval fortress stands atop a promontory along the famous Cinque Terre.

A lover's walk between hilltop towns, decorated with graffiti love notes.

Since the 1960s, this small village has invited painters to decorate its walls.

This giant sculpture made of trash is a critique of society's wastefulness.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

The corpse bride of Portugal.

Elaborate tile work in this railway station tells the story of Portugal.

A hidden three-foot-wide house separates these two regal churches.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Eighteen mummies have stood guard behind the altar of this tiny church since 1833.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

An extraordinary collection of 18th century anatomical waxworks.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.