Just another ancient, mysterious Irish stone circle.

The home of Ireland's last leprechauns is officially protected by the European Union.

A spectacular hidden beach in Ireland has the dark, disturbing nickname of "Murder Hole Beach."

A moody and picturesque riverside ruin overgrown with vegetation.

Three million year old fossils are exposed for all to see on this Icelandic shore.

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.

A lonely beacon, precariously perched atop a remote sliver of rock.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

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.

Walk in the footsteps of the gods and straddle two tectonic plates.

The most powerful waterfall in all of Europe.

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

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

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

Medicinal spa created with the discharge from a geothermal energy plant.

A plaque bearing the names of those who dedicated themselves to protecting Budapest's Jewish population during World War II.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

The hallucinogenic center of the ancient world.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

A small but immensely extravagant palace built by the "Night King."