Original: Sydenham Hill is one of the highest locations in London ; 109 metres ( 357 ft ) above sea level ( spot height on Ordnance Survey Map ) ; and the size of the palace and prominence of the site made it easy to identify from much of London .
Simplified: Sydenham Hill , where the Crystal Palace was , is one of the highest locations in London and the size of the palace made it easy to see from Central London .