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

Rows of multicolored bathing huts paint the sand dunes with pops of color.

One of the world's smallest prisons boasts just two small cells.

The first island in the world designated a light-pollution-free astronomical observation point.

A passage grave used in neolithic rituals.

On an island south of Iceland, a large volcanic rock formation resembles an elephant.

A striking 500-year-old mansion provides an unexpectedly sublime home for live deer and a menagerie of exotic stuffed animals.

One of three sites in England that house the National Collection of Arms and Armour.

A 550-square-meter micro-nation off the coast of Britain.

In 1943 the British military took control of this village, telling residents they had to leave temporarily. The villagers were never allowed to return.

A hidden sculpture garden tucked within the middle of Brighton.

To literally keep their waste out of their own backyards, the citizens of this English city built an impressive sewer system that is still in use today.

A medieval cave used to shelter local hermits now holds nearly 200 old Quaker gravestones.

A quaint hamlet of nine cottages around a small green near Blaise castle.

There's a labyrinth of manmade tunnels stretching for over an acre beneath Bristol.

A relic of the Cold War tucked away in the forested hills above Bratislava.

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

The largest fountain in Bratislava.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

A once-fairy tale mansion now stands in a state of disrepair.

A massive sculpture of an obscure Celtic coin that has become a symbol in Slovakia.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

The only residents of this abandoned housing development full of identical castles are stray cats and dogs.

Dozens of large, brightly-colored paintings adorn the walls of the "street art capital of Iceland."