All the "wonders" are in north Wales: Snowdon (the highest mountain), the Gresford bells (the peal of bells in the medieval church of All Saints at Gresford), the Llangollen bridge (built in 1347 over the River Dee), St Winefride's Well (a pilgrimage site at Holywell) in Flintshire, the Wrexham ( ) steeple (16th-century tower of St Giles' Church, Wrexham), the Overton yew trees (ancient yew trees in the churchyard of St. Mary's at Overton-on-Dee) and Pistyll Rhaeadr – a tall waterfall, at 240 feet .