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

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

The final resting place of soldiers' loyal canine companions.

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

A sweet symbol marks the place where torturous executions were once carried out.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

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

360° views of the city plus five floors of optical illusions and hands-on science.

The fountain marks the area where hundreds of accused witches were burned at the stake.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

This tiny island is home to the world's largest colony of Northern gannets.

Building owners can take out tiles for free at this repository for historic building materials.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

An ornate aviary built during the Victorian trend of collecting exotic birds.

A historic house left in "dramatic still life."

Enormous terracotta heads of Queen Elizabeth and Prince Phillip can be seen on the side of the road to Windsor.

You can spend the night in Dr. Frank-N-Furter's castle.

Human-made caves excavated to hide a secret society of wealthy pagans.

Creating this diorama spurred naturalist Carl Akeley to begin advocating to protect the apes.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

The Tudor-style cottage in the middle of the square is not quite what it seems.