This site is entirely user-supported. See how you can help. If Google Street View is available, the image is from the best available vantage point looking, if possible, towards the location of the monument. Where it is not available, the satellite view is shown instead. Latitude: 52.8545 / 52°51'16"NLongitude: -4.4913 / 4°29'28"WOS Eastings: 232352OS Northings: 331464OS Grid: SH323314Mapcode National: GBR 57.S7F9Mapcode Global: WH44N.ZJG0Entry Name: Pen-y-GaerScheduled Date: 26 September 1994 Source ID: 550Cadw Legacy ID: CN221Schedule Class: DefenceCategory: Promontory Fort - inlandTraditional County: CaernarfonshireA promontory fort dates from the Iron Age. It faces a similar fortified enclosure at Nant y Castell across a very steep-sided gorge. The natural protection afforded by the cliff to the W was supplemented by three defensive banks around the E. Cultivation has removed part of the outer bank but the inner banks are clearly visible. The site is important because the interior is relatively undisturbed, and therefore retains considerable archaeological potential. Its location immediately opposite a similar monument of roughly the same date adds to its significance and group value. The monument is of national importance for its potential to enhance our knowledge of prehistoric settlement and defence. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The structures themselves may be expected to contain archaeological information concerning chronology and building techniques. The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive. Other nearby scheduled monuments