Witley and Milford Common Surrey
This large area consists of heathland, ponds and birch, oak and pine woodland. It's run by the National Trust and is covered with lots of good footpaths to follow. The area is full of flora and fauna with purple heathers, interesting fungi and birds such as Tree pipits, Nightingales and Woodlarks.
There's lots of good options to continue your walking in the area. If you head west you will soon come to Thursley National Nature Reserve and Frensham Country Park.