Harrow Weald Common
This area of common land in Harrow has some nice footpaths to try. There's 18 hectares to explore with woodland, heath and pasture. The common has a car park off Old Redding Road where you can pick ip the trails. Head west and you will soon come to Gilberts Lake and Gilberts Orchard. You'll also pass Grim's Dyke, an ancient earthwork which runs for three miles between the common and Pinner Green. From the high points in the park there are nice views of Central London and the Chilterns. The Harrow viewpoint on Old Redding is a popular spot and a great place to soak in the extensive views.
The common is also great for interesting flora and fauna. Look out for magnificent redwoods, rhododendrons and marsh plants like yellow iris and willow scrub. Keep you eyes peeled for wildlife such as red fox, muntjac deer and a variety of butterflies in the summer months.
The London Loop passes through the common so there is scope for extending your walk. If you head east you can visit Bentley Priory and Stanmore Common where there are more good walking trails to try. Heading west will take you to Oxhey Woods where there is a fine sculpture trail.