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

Repository for more than 22 million pickled specimens.

400-year-old garden, restored to beauty.

London's old-school healing garden.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

One of the world's largest collections of pathological specimens.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

A historic house left in "dramatic still life."

A mysterious artist-run cabinet of curiosities and library.

The remains of Crystal Palace Great Exhibition of 1851.

A network of concealed passageways lies within a busy London Underground station.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

This coffee shop lies hidden beneath a historic church.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

A cluttered and astounding collection of antiquities and curiosities.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

This hidden green space is the city's second largest conservatory.

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

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

The final resting place to 300 Victorian-era pets hides inside the city park.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.