Geograph - photograph every grid square

Here we look along Sherren Avenue, the central thoroughfare of the Charlton Down estate.

The estate occupies a 400-acre site which was the Herrison Mental Hospital, an asylum which had opened in Victorian times and became the Dorset County Mental Hospital in 1920 before taking the Herrison name in 1940.

The three major buildings were redeveloped, following the abandonment of the site in the early 1990s, into dwellings and hundreds of houses, such as those pictured, were built on the surrounding land.