At 1,732 feet above sea level, this spectacularly isolated yet surprisingly bustling bar is the highest pub in Britain.

England's largest white horse isn't even white.

This Gothic Revival castle used as a shooting location for "The Secret Garden" and other films.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

A small but charming botanical garden that contains many exotic plant species.

This architectural beauty is the home to a personal collection of more than 600 examples of mechanical musical instruments.

Building owners can take out tiles for free at this repository for historic building materials.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

The corpse bride of Portugal.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

This charming candle shop has been in business since 1789.

Picturesque intersection of witchcraft and ancient Christianity.

A unique seaside cave where Aleister Crowley faked his own death.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

The world's oldest bookshop still in operation.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

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

The romantic garden was the epicenter of the Hungarian art scene in the 1880s.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.