The geoglyph once sported a glass bottle eye.

It's possible to walk inside one of the largest Neolithic tombs in Britain.

The only pub in the world surrounded by an ancient stone circle.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

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

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

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

Europe's largest prehistoric mound – burial site of a legendary king?

Famously misunderstood wonder of the ancient world

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

A giant Troll lurks under one of Seattle's oldest bridges.

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

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

This 11th-century Cistercian abbey was once seized by Henry VIII.

The view that inspired the scenes of Dracula's first landing in England.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

A walk through the historic city center, under the streets of Seattle.

Portlandia is the second-largest copper repoussé statue in the United States.

An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.