There are hidden patterns on the subway seats of some Stockholm metro cars.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

An abstract representation of weather in Sweden.

There's something in the air as history repeats itself at this museum dedicated to the Swedish pop band.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

This floating sculpture of ice is a poignant reminder of nature's power.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

One of the oldest and largest wooden churches in France was very evidently constructed by shipbuilders.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A remarkable feat of Victorian engineering across the Firth of Forth.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

The oldest church in Inverness witnessed the brutal executions of many Scottish soldiers.

These ruins saw a second life as a cemetery.

After 800 years, Europe's oldest elm tree has met its end.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

A unique art installation located on what was once considered the widest railway bridge in the world.

Glasgow's memorial to the International Brigade volunteers from Great Britain who fought and died in the Spanish Civil War.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

A small collection of objects of a bygone era hide in plain view.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.