Original Photo by Phil Parsons -  CC-BY-SA 3.0

As far as walks go, the Offa’s Dyke walk has an incredible tale to tell. It follows Offa’s Dyke, the longest of Britain’s archaeological monuments, and crosses the border of England and Wales more than 10 times, but it's not for the faint-hearted.  If you follow the whole trail it will take you over an incredible 176 miles (283 kilometres), on a journey through some of the United Kingdom’s most beautiful countryside, including 3 designated Areas of Outstanding Natural Beauty.