A sea cave with a waterfall and Viking past

Glasgow's memorial to the International Brigade volunteers from Great Britain who fought and died in the Spanish Civil War.

This unusual statue overlooking the Royal Mile has an interesting backstory.

In the depths of Glasgow Cathedral's crypt, one pillar stands out from all others.

The United Kingdom's smallest working cathedral also serves as a quaint bed and breakfast.

An abandoned, desolate train tunnel that was used during World War II.

This stately bank building hides a spectacular star-studded ceiling.

The location of this historic castle was inspired by a donkey.

A serene public space nestled within the remains of Glasgow’s Victorian maternity hospital

A bay of elaborate, historic toilets are held in high esteem at this Scottish dock.

The ruins of a medieval seminary some say is the oldest university site in Scotland.

This abandoned oil depot produces world's longest echo in a manmade structure.

A historic cave in Scotland once served as a hiding place for a famous Covenanter.

Possibly the oldest living thing in Europe, more likely a pagan survivor.

This hill nestled in the Scottish lowlands was a ritual site for over 4,000 years.

One of Scotland's most important modern structures, it just made the '100 Most Endangered Sites' list.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

These fantastically named natural pools look like something out of a Scottish myth.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

These ancient sea caves hold Britain's highest concentration of Pictish rock carvings.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.