YHA Llwyn y Celyn offers access to some of the best walking in Wales. Choose gentle strolls alongside the Brecon and Monmouth Canal or ascend across the spectacular ridges and peaks of Pen-y-Fan (2,907 feet) and Corn Du (2,863 feet). Guided walks are organised by the National Park between April and October. Cosy accommodation greets your return to the property, an 18th century Welsh farmhouse set in 15 acres of ancient woodland.