The Limbo Connection's photos with the keyword: astrolabe

Nikon D700 + Nikkor 20mm f/3.5 AI-S lens.

How appropriate that an astrolabe, an instrument used to locate and predict the future locations of the sun, moon, stars and planets, should be found in the garden of Avebury Manor. Astrolabes have been used to survey and triangulate since classical antiquity.