Horseshoe Falls (Welsh: Rhaeadr y Bedol[1]) (grid reference SJ196433) is a weir on the River Dee near Llantysilio Hall in Denbighshire, Wales, about 5 kilometres (3 mi) north-west of the town of Llangollen.

The distinctively shaped weir, which is 460 feet (140 m) long, helps create a pool of water that can enter the Llangollen Canal (via an adjacent valve house and flow meter).

[2] The weir was an important factor in the retention of the canal to Llangollen when the owners of the entire Shropshire Union system, the London, Midland and Scottish Railway, decided to close much of the network in 1944.

With the steady decline in commercial traffic, British Waterways negotiated with the Mid and South East Cheshire Water Board, and the canal is used to transfer water from the Dee at Llantysilio to a reservoir near Hurleston Junction, to the north of Nantwich.

[7] Since 2009, the weir has been part of a World Heritage Site, which covers 11 miles (18 km) of the Llangollen Canal from just west of Horseshoe Falls to just beyond Chirk Aqueduct.