|North: TV mast at Alexandra palace|
|South: TV mast at Crystal Palace|
|15th century St Mary's Tower Hornsey|
|A modern tower from Tower Bridge|
|The BT Tower is 50 years old but still looks futuristic (pic taken just after the demolition of Middlesex Hospital)|
A London Walk costs £10 – £8 concession. To join a London Walk, simply meet your guide at the designated tube station at the appointed time. Details of all London Walks can be found at www.walks.com.