From fortification to folly, this hilltop structure has undergone many changes in the last 800 years.

The remains of a 19th-century carving of what was to be a signal light on the Firth of Forth Estuary.

This ancient monument has been dissembled and put back together at least twice.

The last water-powered beam pumping engine in Britain.

An amazing model of a whale's jaw bone pays homage to the region's seafaring traditions.

This unassuming stone is possibly the oldest Scottish memorial to the 13th-century knight.

A circle made up of 19 boulders has stood in Scotland's Bladnoch Valley for some 4,000 years.

A 2,000-year-old Iron Age fort offers stunning ocean views.

On a corner of the Ardmeanach peninsula on the Isle of Mull, a 50 million-year-old fossil tree hides in the coastal cliffs.

Considered "the most original, complete, and unimproved" circles in Aberdeenshire.

This massive, 30-foot-tall statue of the famed Scottish knight overlooks a grassy knoll.

It's believed a castle existed at this site since the 12th century.

This former chapel resides on an island connected to the mainland by one of Shetland's iconic beachy tombolos.

No other place in Scotland has such a high concentration of prehistoric carved stone surfaces.

Built in the 16th century, the tower is now in ruins.

Now in ruins, this abbey was the home of Tironensian monks for more than 400 years.

A private home envelops the ruins of this 13th-century priory.

The ruins of a 12th-century seaside castle on the southwest coast of Scotland.

A re-purposed wooden sculpture, depicting one of Scotland's most beloved writer's amphibious creations.

An impressive piece of infrastructure that seems outsized when considering it serves an island with a population of less than 300.

The fictional birthplace of the Chief Engineer aboard the Starship Enterprise.

Named for its similarity to the tip of a violin's bow, this striking formation was created by millions of years of erosion.

Designed to allow funerals to proceed over the River Dulnain.

The ruins of a 15th-century castle that has seen its fair share of bitter feuds.