The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

The atmospheric road was never meant to be so creepy.

Once home to a Scottish baronet, this 18th-century historic house doubles as a legendary art space.

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

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

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

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

Scotland's first Masonic lodge may also be the oldest in the world.

This tiny weathered plot is one of the oldest Jewish cemeteries in Scotland.

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

A once extravagant mansion, now reduced to ruin.

Possibly the world's smallest museum is home to one exhibit that sheds light on the capital city's dark criminal history.

Nestled among the living residents is the final resting place of an apothecary plague victim.

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

The building where Mary, Queen of Scots was said to have bathed in white wine.

A pair of stones embedded in an Edinburgh street memorialize one of the city's last public hangings.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

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

A library where thousands of books explain how to avoid another Great Recession.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

The final resting place of soldiers' loyal canine companions.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

This allegedly haunted 16th-century tower house-turned-museum exhibits thousands of spectacular objects.