At the time of building, it was possible to view the reservoir of what would become Ruislip Lido, and the church of Harrow on the Hill, St. Mary's.
Currently it is housed in the Vaughan Library at the Harrow School in Harrow on the Hill.
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A scenic spot on the Capital Ring in the summer months, Horsenden Hill offers fine views across west London and beyond; places visible include Harrow on the Hill, the new Wembley Stadium, Northala Fields, planes coming in to land at Heathrow Airport, and on a clear day, the Home Counties of Surrey, Berkshire and Buckinghamshire.
The Metropolitan and Great Central Joint Railway was a joint railway company that controlled a line extending from Harrow on the Hill in what is now north-western Greater London to Verney Junction in Buckinghamshire, England.
The line to Aylesbury Vale Parkway via Amersham runs alongside London Underground's Metropolitan Line between Finchley Road) and Harrow-on-the-Hill, with each operator running on separate tracks, then shares the tracks with Metropolitan Line services.