Offa's Dyke Offa's Dyke lies between Wales and England on the border. It was built during King Offa's reign (between the years of 757 and 796) to dived his kingdom of England from the Welsh. Offa's Dyke (an embankment) stretches for 80 miles and has survived for more than 1,200 years. In the 1970s Offa's Dyke National Trail was established. Address: . Wales
