A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

This 19th-century prison once held Irish revolutionary Constance Markievicz, writer Frank O’Connor, and a nine-year-old pickpocket.

Horse cemetery on the grounds of Blarney Castle.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

A tunnel with windows, so you don't miss out on the impressive views.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

The fairy tale castle of the "fairy-tale king."

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Baroque celebration of the end of the Great Plague of Vienna.

Walk through Czech history in Prague's largest graveyard.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

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

The fountain marks the area where hundreds of accused witches were burned at the stake.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.