Possibly the oldest living thing in Europe, more likely a pagan survivor.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

The enigmatic stone has towered over a Northern Ireland town for thousands of years.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

The remains of a 13th-century Franciscan friary have survived multiple attempts at destruction, most recently in 1921.

The remains of this deep, dark mine have left behind a haunting rocky warren of tunnels.

These moss-covered medieval ruins tower atop the smallest of Ireland's Aran Islands.

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

A hugely vast Irish landscape of barren rock that stretches for miles.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

An 1814 castle that hosts an exhibit of "explorabilia".

This 14th century tower house was once the home of Irish poet W.B. Yeats.

The world's tallest box hedge is found in a delightful garden.

This headstone-like marker inscribed with three words has been an utter mystery for over a century.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

This cave was once thought to be a hiding place for the devil.

A miniature village lies nearly forgotten in the forest by the side of a major highway.

Legend says squeezing into this slender stone seat will make your wish come true.

Some of the secrets of human origin are revealed at this museum.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

Architectureal fantasy quarter of Rome.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A large replica of a monumental Roman inscription is located on the side of this museum.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.