An ancient Viking runestone hidden in plain view in Stockholm's old town.

It houses the remains of a 17th-century version of the Titanic.

The prototype for all Nazi concentration camps.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

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

Go inside to really appreciate this 500-year-old technological masterpiece.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

This bridge was constructed from the rubble of the infamous Bastille.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

How did a French journalist’s grave become the sexiest statue in the cemetery?

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

These ruins saw a second life as a cemetery.

The castle that provided the setting for much of 'Monty Python and the Holy Grail' is now a pilgrimage site for fans.

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

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

This charming old building's loose connection with the Scottish Reformer is what saved it from demolition after it split apart.

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

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

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