This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

A symbol for the opposition to nuclear power around the world.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

A poignant memorial shows the widows and children left heartbroken by the worst fishing disaster in Scottish history.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

These upturned herring boats make nifty storage sheds for fishing goods.

The medieval-looking hammer beam teak roof may be a Victorian vanity, but it's still absolutely magnificent.

One of Edinburgh's oldest pubs hides a 19th-century skittles alley in the back.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

This early version of the guillotine was used to execute the man responsible for its construction.

The most loyal of little dogs, or a Victorian era publicity stunt?

A secret garden in a picturesque Edinburgh village has inspired artists for centuries.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

A book bound in the skin of an infamous criminal, along with countless other specimens.

A 18th century graveyard and its astonishing cortege of macabre iconography.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

A six-ton wedding present for the King of the Scots.

The Scottish Reformation leader's grave was paved over and is now a parking lot.

The final resting place of soldiers' loyal canine companions.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

The world’s first museum dedicated to the history of childhood opened in Edinburgh in 1955.

This 16th-century house tells the city's history through old artifacts and quirky tales.