The longest staircase lock in Britain.

From here, the loch appears to take the shape of mainland Scotland.

This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.

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

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

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

This 11th-century Cistercian abbey was once seized by Henry VIII.

An abandoned Yorkshire castle that is hidden in plain sight.

This bridge once allowed Dere Street to cross the River Tees.

This unusual sculpture is sometimes partially, sometimes fully, submerged.

This small museum in a 17th-century building honors three iconic Scottish writers.

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

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

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

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

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

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

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

The world’s first museum dedicated to the history of childhood opened in Edinburgh in 1955.

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

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Now home to a drinking establishment, this building has a macabre history.

An ornate "graveyard" for some of the country's forlorn building relics.

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