The Preseli Hills are a range of hills located in Pembrokeshire, Wales. They are known for their stunning landscapes, featuring rugged terrain, rocky outcrops, and lush valleys. The hills reach a height of 536 meters at their highest point, called Foel Cwmcerwyn. This area is popular for hiking and offers various trails for outdoor enthusiasts. The Preseli Hills are also significant for their geological history, as they are composed mainly of granite and sandstone. These hills are famous for being the source of the stones used in the construction of Stonehenge, a prehistoric monument in Wiltshire, England. The region is rich in wildlife and is part of the Pembrokeshire Coast National Park.