This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

Two stone columns flank the grand Venice square, but there were supposed to be three.

A crumbling World War I fort that is reached through a series of concrete tunnels.

This abandoned Slovenian military barracks has become a punky-political art squat.

A whimsical bridge adorned with decorative dragons.

A public work of art that also provides some relief from the summer heat.

Inspired by the Rialto Bridge in Venice, these three clustered bridges were just one part of a Slovenian architect’s grand vision.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

Picturesque basketball courts sheltered by historical defensive walls and with an enviable sea view.

The oldest arboretum on the Dalmatian coast doubles as the gardens of Kings Landing in "Game of Thrones."

Longest fortress system anywhere in Europe.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

A fantastic castle rumored to be the birthplace of King Arthur.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

Every hour on the hour a naked heroine and her leering foil appear from this giant cuckoo clock.

A preserved block of timber buildings from the city's industrial era in the Middle Ages.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

This charming railway is one of the oldest and steepest funiculars in England.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

This statue of a celebrated soldier was removed from Dublin and reinstalled in rural Northumberland.