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

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A diminutive, thousand-year-old church believed to be the smallest in Ireland.

A sea cave with a waterfall and Viking past

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

This picturesque archeological site looks like it was pulled straight from a fantasy novel.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

Scotland's only funicular railway is also the United Kingdom's highest.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

This ethereal, rainforest-like gorge is home to waterfalls, quaint bridges, and fairy folk.

Largest lake in Great Britain measured by surface area.

This observatory within Europe's first dark sky park offers stunning views of the night sky.

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

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

This series of Scottish caves has no clear purpose other than baffling historians.

360° views of the city plus five floors of optical illusions and hands-on science.

A 30-acre garden inspired by the principles of modern physics.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

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