Walking is a popular recreational activity in London, despite traffic congestion. There are many streets that provide interesting walks, especially within historic central London. In addition there are attractive commons, parks, canals, and disused railway tracks that provide space for walks. This includes Wimbledon Common, Epping Forest, Hampstead Heath, and the eight Royal Parks: Hyde Park, Regent's Park, Richmond Park, etc. In recent years access to canals and rivers, including the Regent's 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.