Caption
Walkers pass the Wharncliffe Viaduct, built in 1838 by Isambard Kingdom Brunel, along a section of London's Capital Ring Walk between Osterley and Greenford. The Capital Ring Walk is a walk which circumnavigates London. it is divided into 15, easy-to-walk sections and covers 78 miles (126KM) of open space, nature reserves, Sites of Specific Scientific Interest and more.