To the west of King Henry's Mound is a panorama of the Thames Valley. St Paul's Cathedral, over 10 miles (16 km) to the east, can be seen through the naked eye or via a telescope that has been installed on the Mound. This vista, created soon after the cathedral was completed in 1710, is protected by a "dome and a half" width of sky on either side. In 2005 the then Mayor of London, Ken Livingstone, sought to overturn this protection and reduce it to "half a dome". In 2009 his successor, Boris Johnson, promised to reinstate the wider view, though also approving a development at Victoria Station which, when completed, will obscure its right-hand corner. New gates − "The Way" − which can be viewed through the King Henry's Mound telescope, were installed in 2012 on the edge of Sidmouth Wood to mark the 300th anniversary of St Paul's.