This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

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

This Scottish museum is the only one in the world to focus not on one religion but all of them.

Every birth, death, and marriage is recorded in these color-coded leather-bound books.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

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

The "Bridge Over the Atlantic" lets you cross the waterway in mere seconds.

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

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

A giant pineapple, a symbol of hospitality, and an amazing vacation rental option.

A sea cave with a waterfall and Viking past

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

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

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

Scotland's only funicular railway is also the United Kingdom's highest.

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

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.

Ruined castle with subterranean vaulted Goblin Ha' or "Goblin Hall."

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

This single-track road rewards brave drivers with stunning Scottish scenery.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

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

The remains of a grand castle that may have inspired Bram Stoker's Dracula.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.