A quartet of brightly colored mythical beasts stand sentry at this gateway.

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

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

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

Many of Edinburgh's more unsavory characters spent their final days behind this door while awaiting their executions.

The location of a citizen uprising that led to a gruesome act of mob justice.

A rare and unique example of an 18th-century door latch calls this restaurant home.

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

This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

Soviet intelligence had a keen interest in the Cold War linguistic school at this old Scottish airfield.

The remains of a 19th-century carving of what was to be a signal light on the Firth of Forth Estuary.

Dedicated to one of the nation's worst engineering disasters.

This bronze statue was erected to honor a small Scottish town's beloved stray cat.

Every St. Andrews student knows to avoid this inscription for fear of a martyr's curse.

"May prick nor purse ne'er fail you."

The initials "GW" mark where one of Scotland's most important Protestant martyrs was burned at the stake.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

Putting the "mod" in "modular" since 2000.

This sculpture of a pylon is upside down and askew, as if its main purpose is to confuse passersby.

Sculptor Antony Gormley used chaos theory and fractal growth to design his tallest creation.

A clock designed to run with perfect accuracy for 10,000 years.

This museum inside a museum tells the story of London's timepieces.

Charles Babbage's proto-computer, painstakingly brought to life.

This ancient spring in central London was featured in a Peter Pan story.