This 5,300-year-old tomb with mysterious carvings crowns an Irish mountain.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

Petrified footprints of one of the very first vertebrates to walk on land.

This 30-foot pile of rocks may be the grave of a mythological Irish queen.

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

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The ancient tomb acts as a calendar that keeps perfect time.

This Roman relic was discovered in Scotland by a mudlarking ferryman.

Scotland still bears an enormous scar of its Roman past.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

This unusual rock looks like a giant, otherworldly mushroom sprouting atop a cave.

A close look reveals that the Scottish monument is just slightly off-kilter.

A magnificent, iconic stone tower in the Scottish Highlands.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

These ancient sea caves hold Britain's highest concentration of Pictish rock carvings.

These ruins are a hidden gem, complete with fantastic views over the cliff edge.

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

Ruined castle with subterranean vaulted Goblin Ha' or "Goblin Hall."

A remarkably well preserved tower dating all the way back to the Iron Age.

This waterfall is one of the most spectacular natural features in the Scottish Lowlands.

Hidden in a Scotland museum is a copse of extinct tree stumps.

Possibly the oldest of Britain's ancient henges is also one of its most stark.