This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

The oldest hall in Iceland was written of in the Sagas and features a centuries-old escape tunnel.

Puffin enthusiasts flock to Europe's largest seabird cliff, which over one million birds call home.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

The Arctic Circle runs through this isolated spot north of Iceland.

The summer tourists on these cliffs are thousands of seabirds.

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.

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

Climb right into the heart of this colorful Iceland volcano.

The most powerful waterfall in all of Europe.

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

This replica Viking village was created for a film that was never shot and is now open to visitors.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

A little-visited waterfall in an otherworldly landscape.