The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Bronze plates placed around this Scottish fishing village form a true-scale model of the solar system.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

Even though some of the buildings date back to the Victorian era, this research institute is still involved in cutting-edge astronomy research.

A book bound in the skin of an infamous criminal, along with countless other specimens.

A secret garden in a picturesque Edinburgh village has inspired artists for centuries.

This series of Scottish caves has no clear purpose other than baffling historians.

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

This mountain is one of the largest in Scotland but is better known for its hollow insides.

This eclectic sanctuary is a hodgepodge of various architectural styles, all crammed into one building.

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

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

Geodesic dome luxury retreat in the Scottish Highlands.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

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