The Seven Sisters is a dramtic coastal walk in south-east England, about 90 mins by train or car from London. It is soon to be part of the new South Downs National Park.
The whole are is open downland (short grass, no trees), with hills around 600 feet/200 metres, so good views.
The classic walk is Seaford along the coast to Eastbourne (both have train stations, or return to your car by regular bus service). This walk is along open downland, along the top of chalk cliffs, passing a river valley (paddle at low tide, or 2 mile detour inland to a bridge) and Beachy Head.
Equally good is the rest of the South Downs Way (marked on the OS map) Southease (train station) to Alfriston to Eastbourne.
Short Walk Ideas: 1) Anywhere along the Seven Sisters coast - accessable be road and (in summer) an open topped bus. 2) Alfriston to Wilmington Hill and back 3) Along the Eastbourne Seafront promenade
See Time Out Country Walks Volume 2, which has 3 walks in this area
Eastbourne: south coast seaside town with pier and promenade
Alfriston: beautiful village with green and picturesque church, YHA, hotels.
Lewes: pretty town with castle, but hard to park
Smaller village with pub: Jevington
Also worth visting is the Blomsbury Farmhouse (poor art, but lovely garden and location)
Ideas for Short Weekend Trips away from London, and Walking holidays in Europe