Flaming barrels of tar race through these village streets on Bonfire Night, a tradition that dates back centuries.

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

This beautifully restored fortification kept the city safe for centuries.

A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

This spectacular mosque houses the second-largest chandelier in the world.

Catacombs turned marketplace.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

Eighty million natural history specimens call this gargantuan museum home.

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

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

The history and future of cannabis.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

This antique prison is a tourist attraction with a sordid past.

The world's largest collection of witchcraft regalia.

This tangled English forest looks like something right out of a fairytale.

These mysterious mazes carved on the rock may be up to 4,000 years old.

The largest greenhouse in the world is home to over one million types of plants.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

One could not be blamed for literally walking all over this supposed landmark.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

Locals call it the "Give Peas a Chance" bridge because of its distinct graffiti.

A giant roundabout made up of six smaller roundabouts can befuddle the uninitiated.

This early Norman castle was the first historical monument protected by an act of Parliament.