The world is your oyster! Head out in any direction and you'll find a memorable ride.
Obvious examples would include:
Head out over Newlands Corner to Dorking or take a right at Abinger and do the Holmbury/Leith Hill circuit.
The Downslink Way from Guildford to Shoreham (go as far as you wish and then turn back)?
The Christmas Pie trail out towards Farnham.