In ancient Norse mythology and cosmology, Yggdrasil is an immense tree that sprang forth in the primordial void of Ginnungagap, unifying the 9 worlds of Asgard, Álfheimr/Ljósálfheimr, Niðavellir/Svartálfaheimr, Midgard (Earth), Jötunheimr/Útgarðr, Vanaheim, Niflheim, Muspelheim & Hel.
Hertfordshire is a county in southern England that sits directly above London. With occupation stretching as far back as the Mesolithic period, Hertfordshire is rich in a variety of historical sites, monuments and ancient ruins waiting for you to explore.
A trelleborg or ring fort was a circular fortification built across Denmark and Sweden during the Viking age. Similar structures have been found throughout Northern Europe, particularly in Ireland, but none have the same strict and precise geometrical design of the Scandinavian ring fortresses.