You can take on one of Walk London's routes for free at any point in the year, but their Spring into Summer weekend is your chance to be led through some of London's most special landscapes. More than 40 events will take place with a wide variety of distances, so even those in it for the sights rather than the exercise will enjoy themselves. A two mile route along the canal will help you to explore Little Venice and Camden (May 30, 1pm), the nine and a half miles between Kingston and Richmond take in Bushey Park (May 30 10am). A Bloomsbury tour reveals the rich history of the area in one and a half miles (May 31 at 2pm) and a less familiar seven and a half miles from Belvedere in south east London takes walkers out to Severndroog Castle (May 31, 11.15am). All walks are free but some require places to be booked in advance. Visit the Walk London website for full details.