Penrhyn Castle Railway Museum
The Penrhyn Castle Railway Museum is a museum of industrial railway equipment, located at Penrhyn Castle near Bangor in Wales.
In the nineteenth century, Penrhyn Castle was the home of the Pennant family, owners of the Penrhyn slate quarry at Bethesda. The quarry was closely associated with the development of industrial narrow-gauge railways, and in particular the Penrhyn Quarry Railway, one of the earliest industrial railways in the world. The PQR ran close to Penrhyn Castle, and when the castle was bequeathed to the National Trust in 1951 a small museum of industrial railway relics was created in the stable block.
The first locomotive donated to the museum was Charles, one of the three remaining steam locomotives working on the PQR. Over the years a number of other historically significant British narrow-gauge locomotives and other artifacts have been added to the collection.
Locomotives
| Name | Gauge | Builder | Type | Date | Works number | Notes |
| Charles | Hunslet | 1882 | 283 | Worked on the Penrhyn Quarry Railway | ||
| Hugh Napier | Hunslet | 1904 | 855 | ex-Penrhyn Quarry locomotive, restored to working order at Boston Lodge in 2012 | ||
| Fire Queen | Horlocks | tender | 1848 | Worked on the Padarn Railway | ||
| Watkin | De Winton | 1893 | ex-Penmaenmawr & Welsh Granite Co. | |||
| Kettering Furnaces No. 3 | Black, Hawthorn & Co | 1885 | 859 | ex-Kettering Ironstone Railway | ||
| No. 1 | Neilson and Company | 1870 | 1561 | ex Beckton Gas Works railway | ||
| Hawarden | Hudswell Clarke | 1899 | 526 | ex Globe Ironworks, Stalybridge | ||
| Vesta | Hudswell Clarke | 1916 | 1223 | ex Hawarden Bridge steel works | ||
| Haydock | Josiah Evans / Richard Evans and Co. | 1879 | 2309 | ex Haydock Foundry, Haydock |