Russian researchers who have been excavating ancient squirrel burrows may have brought a 32,000-year-old plant back to life.

The stately remains of Llywelyn the Great's mighty fortress.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

A peace symbol in Northern Ireland is among the world's largest hedge mazes.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

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

Wallabies live naturally on this Irish island.

The inscribed stone at Kilnasaggart is a remnant from nearly a millennium ago.

This small collection of rare books was uniquely locked up for safe keeping.

One of the oldest libraries in England, and one of the last of the great medieval chained collections.

An unusual round church in London with a Templar past.

Hidden beneath the streets of London is a secret subway that only carried mail.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

A 200-year-old collection of oddities and medical paraphernalia.

The anatomical-pathological collection of a man who changed surgery.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

The Egyptian-inspired last resting place of Lord Kilmorey.

The beams of the New College, Oxford dining hall come with an amazing story.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

Detailed sandstone carvings show an array of symbolism and adorable animals.

Used as an example in one of the first dictionary entries for "museum" in 1706.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

The oldest working mechanical clock in the world.