Pen y Fan Pen y Fan Pen y Fan () is the highest peak in south Wales, situated in the Brecon Beacons National Park. At above sea-level, it is also the highest British peak south of Cadair Idris in Snowdonia. The twin summits of Pen y Fan and Corn Du at 873 m (2,864 ft) were formerly referred to as Cadair Arthur or 'Arthur's Seat'. The mountain and surrounding area are owned by the National Trust whose work parties attempt to combat the erosion caused by the passage of thousands of feet up and down this most popular of South Wales' peaks. The
Pen-y-Fal Hospital to be converted to luxury housing. The last burials here were in 1948 when the hospital came under the management of the NHS. Pen-y-Fal Hospital Pen-y-Fal Hospital was a psychiatric hospital in Abergavenny, Monmouthshire, opened in 1851 and closed in 1996. It held up to 1,170 patients at its peak. The facility went under a variety of names: Pen-y-Fal was designed initially to house 250 patients. Its architect, Thomas Fulljames of Gloucester, assisted by Frederick Sandham Waller, chose the Tudor Gothic style using local old red sandstone with Bath stone dressings to animate its charming gathering of gables and chimneys.