This Irish museum in a historic 19th century market pays tribute to the glory of butter.

The oldest public library in Ireland.

360° views of the city plus five floors of optical illusions and hands-on science.

A tongue-in-cheek arcade where the games are based on everyday life.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

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

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

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

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

The largest of London's subterranean rivers and once a mad, bad center of London life.

London's old-school healing garden.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."