This is the Folly on Nore Hill, the story goes that the Lady of the house wanted an arch that resembled the one in a print that she owned. Just in front can be seen a trig point, these trig point were used in the 1930's to triangulate the country for the 1 mile to an inch ordnance survey maps.
Nearing the end of the walk, a narrow footpath running alongside a field ditch opens out into the March sunshine. A cold but bright day makes you think that summer is not to far away.
Its a very flat area away from the South Downs (which can just be seen in the distance) which makes for easy walking. This particular walk is about 4 miles.