The oldest volcanology research center in the world.

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

The Pope’s secret escape route.

The first island in the world designated a light-pollution-free astronomical observation point.

A statue erected in honor of the toadish nickname given to Jersey residents by the French.

An 800-year-old island castle in Guernsey's main harbor.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The castle still holds traces of the abandoned Roman fort it was built atop.

One of the few surviving street funiculars in the world.

Recently restored menagerie of Victorian-era beasts.

A giant pineapple, a symbol of hospitality, and an amazing vacation rental option.

This single-track road rewards brave drivers with stunning Scottish scenery.

The final resting place of soldiers' loyal canine companions.

The remains of a grand castle that may have inspired Bram Stoker's Dracula.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

Largest lake in Great Britain measured by surface area.

A mysterious monument where a woman who records say never existed was burnt alive for being a witch.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

The heads of two giant mythological water horses honor Scotland's horselord past.

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

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

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

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.