(PQR), one of the earliest industrial railways in the world. In 1951 a museum of railway relics was created in the stable block. The first locomotive donated was Charles, one of the three remaining steam locomotives working on the PQR. A number of other historically significant British narrow-gauge locomotives and other artefacts have since been added to the collection. Popular culture and events In 2014, Welsh National Opera used Penrhyn as the location for their filming of Claude Debussy's opera La chute de la maison Usher, based on Edgar Allan Poe's story The Fall of the House of Usher. It has also be used as a television filming location. A parkrun takes place in the grounds of the castle each Saturday morning, starting and finishing at the castle gates. The fee to enter the castle grounds is waived for runners. Gallery See also Castles in Great Britain and Ireland List of castles in Wales List of gardens in Wales Notes References Sources External links Penrhyn Castle information at the National Trust Illustrated Guide to Penrhyn Castle Buildings and structures completed in 1837 Mock castles in Wales Gardens in Wales National Trust properties in Wales Historic house museums in Wales Railway museums in Wales Toy museums Museums in Gwynedd Castles in Gwynedd Country houses in Wales Llandygai Grade I listed buildings in Gwynedd Toy museums in Wales Grade I listed museum buildings Registered historic parks and gardens in Gwynedd