Charles Darwin famously built a circular path in the grounds of Down House near Orpington, Kent, soon after he moved there in 1842. It became known as the Sandwalk, a gravel-lined oval walk around the trees and bushes he planted. He called this his ‘thinking path’ and walked it morning and afternoon, often with his fox terrier Polly, observing seasonal changes, while mulling over his most difficult problems.  Read more