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

The rusting remnants of a flying boat lie scattered near the site of its fatal crash.

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

The ruins of a defunct limestone quarry still haunt this Scottish promontory.

These skilfully executed, poignant works of art dot a verdant Scottish dell.

A carved bench marks the Scottish cave that inspired the classic adventure novel "Treasure Island."

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

The artwork is tucked within a cave on a tiny Scottish island only accessible at low tide.

The sign announces the Scottish village's cosmic connections, as it's twinned with Glenelg, Mars.

A bizarre stone beast lurks on the beach of a popular tourist island.

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

Originally intended as a temporary installation, this sculpture is now a permanent part of a stunning Scottish beach.

The 5,000-year-old megalith is believed to be Scotland's tallest standing stone.

This seaside Scottish holiday rental lets you live out your bookselling dreams.

A trio of giant megalithic stones in the middle of a golf course.

This unusual rock looks like a giant, otherworldly mushroom sprouting atop a cave.

This 1,300-year-old marker is one of the finest and most complete early Christian crosses in Scotland.

The last manually operated turntable ferry in the world.

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

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

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

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

Modern megaliths form this work of cosmic, Celtic landscape art.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.