Here is a 3d model of a an ancient hill fort near crymych, on the presceli mountains shot with my dji inspire on a very windy day .Foel DryGarn--'This Late Bronze Age / Early Iron Age hillfort stands at the end of the Preseli range and is capped by three cairns which can be seen for miles around. Aerial photographs have revealed numerous hut circles on the summit. http://www.megalithic.co.uk/article.php?sid=4331