Wonderfully preserved Victorian factory, complete with a preserved steam powered engine house.

The ornate structure is part of a building boasting more marble than the Vatican.

The world's oldest surviving music hall was also once a freakshow.

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

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

A book bound in the skin of an infamous criminal, along with countless other specimens.

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

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A former fortified tower now houses a collection of classic communications equipment.

A devastating booze inferno poured through the streets, claiming several victims who drank it.

An outstanding and haunting glimpse of the horrors of the Great Famine of Ireland.

The oldest licensed distillery in Ireland.

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

A corkscrew-shaped barn in Ireland.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

One of Scotland's most important modern structures, it just made the '100 Most Endangered Sites' list.

A five-story homage to tea times past.

This hydraulic power system in London was, at one time, seen as a rival to electricity and the last of its kind to shut down.

Preserved behind glass, the ruins of a medieval building used to store human remains.

A secluded green oasis amidst the towering skyscrapers, bears an unusual moniker that reflects one of the city's oldest guilds.

This inn of the court provides a fascinating window into London’s legal and architectural history.

This hospital helped pave the way for treatment that drove down child-mortality rates in 19th and 20th centuries.

A series of carved figures that scandalized British society.