Walking is a popular recreational activity in London, despite traffic congestion. There are many areas that provide space for interesting walks, including commons, parks, canals, and disused railway tracks. This includes Wimbledon Common, Hampstead Heath, the eight Royal Parks, Hampton Court Park, and Epping Forest. In recent years access to canals and rivers, including the Regents Canal, and the River Thames has been greatly improved, and as well a number of long-distance walking routes have been created that link green spaces.