Very conveniently placed not far from both the M25 and M40, but surprisingly green, and surrounded by woodland. London is only eighteen miles away, and you can reach it by train from Denham Green into Marylebone.
Get a travel card and you can use it on the underground, buses and the Dockland Light Railway. If the capital is not for you, visit Windsor for the lovely castle, looking almost unreal above the town and valley, and Savill Garden in the Great Park. Also within easy reach is Beaconsfield for the Bekonscot Model Village, Runnymede for its Magna Carta associations, or even Oxford with all the architectural splendors of the colleges. Don't ignore the Thames - you can enjoy small towns like Marlow and Henley for river trips.
For quieter pursuits, visit Cliveden, once the home of the Astors, or West Wycombe Park, both now looked after by the National Trust. The beautiful Denham Country Park is also nearby.