Semi-precious Blue John stones have been mined in this cavern system for centuries.

One of the largest mechanical models of the solar system in the world.

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

The last of the 19th-century booze-free bars has been slinging teetotal tonics for over a century.

Great Britain's only hat-making museum.

These lovely Turkish-styled baths were brought back to life after winning a reality show competition.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

Manchester's abandoned train depot lingers in a post-industrial purgatory.

Despite having a dome made of papier-mâché this tiny observatory has survived for over a century.

Have a seat with the father of modern computing at this Manchester monument.

The fake World Cup prize was secretly created after the first one was stolen in 1966.

The small bright red pillar survived the 1996 Manchester bombing virtually unscathed.

This nondescript building hides an entrance to an underground nuclear tunnel system.

Be on the lookout for the symbolic insect all over the city.

A Milanese café entirely designed by the American director Wes Anderson.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Copenhagen's celebrated theme park and gardens.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.