This volcanic plug boasts the longest recorded history of any Scottish stronghold.

The ornate structure is part of a building boasting more marble than the Vatican.

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

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

Even after the church tried to wipe the practice out, this pagan festival lives on each year in a small Scottish village.

Enter this small nook and you'll be surrounded by 360 degrees of street art.

This Birnam-based garden honors the legacy of 19th-century children’s book author Beatrix Potter.

This waterfall is one of the most spectacular natural features in the Scottish Lowlands.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.

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

The abandoned transportation hub hides within the Glasgow attraction it once served.

One of Edinburgh's oldest pubs hides a 19th-century skittles alley in the back.

These ruins are a hidden gem, complete with fantastic views over the cliff edge.

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

A hidden tunnel leads to a medieval queen's shrine buried beneath a parking lot.

A fernery hidden by neglect is uncovered, and an ancient specimen along with it.

This picturesque archeological site looks like it was pulled straight from a fantasy novel.

The only fixed chain and post trail in Scotland snakes its way along the base of a towering seaside cliff.

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

A succession of eerily contemplative iron figures lead from a Scottish museum to the sea.

This tiny little cave was said to have been a refuge for a saint with a glowing arm.

Legend says this cave housed a 16th-century cannibal and his family of 48.

A remarkably well preserved tower dating all the way back to the Iron Age.