The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Walk through a fairytale in Tuscany.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Mountain where Jesus was first tempted by the Devil.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This massive subterranean fissure is known as the "underground Grand Canyon."

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

The attic of a four-century-old canal house hides a clandestine church.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

Nordic giants resurrected from the sea and restored to their former greatness.

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

Copenhagen's celebrated theme park and gardens.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Op-art architecture designed for happiness.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.