The world’s second-largest flood defense barrier has protected London for decades.

An 11th-century Viking gravestone in a Victorian parish church graveyard.

Inscribed on the gate are the names of 29 figures from the University's first five centuries.

On this spot Lord Kelvin allegedly discovered absolute zero.

The historical home of Colonel Noah Orr, also known as the “Union County Giant” who stood at 7ft 8ins.

Modern megaliths form this work of cosmic, Celtic landscape art.

The highest station on the highest adhesion railway in the British Isles.

This severely painted building has a twisted connection to the witch hunts of the 1640s.

A mysterious ruin shrouded in more folklore than fact.

The heart of a Scottish legend had a centuries-long journey before reaching its final resting place.

Built to hold the worst of the worst of the Nazi war prisoners.

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

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

The heads of two giant mythological water horses honor Scotland's horselord past.

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

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

These crumbling ruins are all that's left of the ancestral home of Clan Crawford.

The oldest library in Scotland was built from the remains of a church to hold a churchman's library.

Glasgow's oldest pub has a proud literary tradition and possibly a ghost or two.

This vessel is the final ocean-going paddle steamer in the world.

An 18th-century religious argument etched into stone.

This Norman church survived the Reformation before suffering 300 years of neglect.

A pair of stone circles positioned on the bank of the River Esk.

The Devil’s Porridge tells the story of HM Factory Gretna and the munitions girls who mixed deadly chemicals.