Trefignath chambered tomb and standing stones - Credit: Wikimedia Commons
Trefignath is a Neolithic burial chamber near Trearddur, south of Holyhead on Holy Island, off Anglesey in Wales. In its most complete form it included a large cairn covering three stone tombs, set on a small knoll. It was excavated between 1977 and 1979, revealing several phases of occupation with three separate burial chambers built in succession. It is a scheduled ancient monument, maintained by Cadw. Read more on Wikipedia
Source: en.wikipedia.org