You might want to look north to the Great Barrows of East Yorkshire e.g. http://www.themodernantiquarian.com/site/92/duggleby_howe.html.
There are many parallels between prehistoric East Yorkshire and Wessex.
It might also be worth casting an eye on structures such as Maeve’s Cairn
http://www.themodernantiquarian.com/site/2302/knocknarea.html

In some parts of the world, they've never really stopped building them e.g. the four mounds of Krakow
http://www.krakow-info.com/mounds.htm

cheers
fitz