Perched above a grotto, this tribute to Mother Nature looks out into the ocean.

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

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

A local student's chance encounter with Keith Haring led to the creation of one of Europe's largest murals.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

Anatomical cabinet holds unexpected treasures.

The remains of a Dominican friary, once one of the largest of its kind in the United Kingdom.

This sculpture commemorates a naturalist and an illustrator whose work was a forerunner to modern field guides.

Inside this chapel, Victorian jailers took the separate system to new levels.

Legend says this demonic carving inside a medieval cathedral was one of Satan's minions.

Built in 1911, the Tees Transporter Bridge is one of only six transporter bridges still in operation.

A modern English garden of eccentric beasts, follies, and oddities.

The oldest candy store in the world has been selling traditional sweets since 1827.

Reputedly based on the tomb of Jesus Christ, this crypt is the oldest surviving structure of any cathedral in England.

A monument to the real explorer and bear who inspired characters in Philip Pullman's 'His Dark Materials.'

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This Underground station has been a popular filming location for decades, even before it closed.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

Rare collection of medieval books under lock and key.