Park Square and Park Crescent Gardens are two of the grandest gardens at Regent's Park and two of the larger communal garden squares in London. Designed by John Nash, they retain most of their original layout and have been managed since 1824 by the Crown Estate Paving Commission. A particular highlight is the Nursemaids’ Tunnel, an early pedestrian underpass connecting Park Square to Park Crescent. Two splendid plane trees, believed to have been planted in 1817 to mark the 1815 Allied victory at Waterloo, dominate Park Crescent. Other distinctive trees include a tulip tree (Liriodendron tulipifera) and weeping silver lime (Tilia tomentosa ‘Petiolaris’).