Europe's largest community of crocodiles and alligators.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Journey through the ruins of this ancient Roman temple dedicated to the god of war.

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

One of the great treasures of Neolithic art lies within this carefully constructed pile of rocks.

The haunting concrete remains of a Nazi pebble crusher can still be found in this small French commune.

An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.

If they push on just the right spot, even the weakest person can move this titanic boulder.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

An unusual manor of stunning beauty, born out of a crippling disease.

This single room has survived the centuries with almost no deterioration.

The "Black Arch" guards the entrance to the picturesque Glens of Antrim.

Every year locals give the bear a fresh coat of paint to preserve its signature goofy grin.

The atmospheric road was never meant to be so creepy.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

This Italian-style temple replica has been threatening to fall off the Irish coast for hundreds of years.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

This cramped crevasse saw the entire population of its island suffocated inside its depths.

These fantastically named natural pools look like something out of a Scottish myth.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.