Hadleigh Country Park roundhouse
ENGLAND
 Marthrown of Maribe roundhouse
SCOTLAND
 Melin Llynnon roundhouse
WALES
 Irish National Heritage Park roundhouse
IRELAND and N.IRELAND
If your roundhouse is not on the list, and you would like it to be; or if you know of any roundhouses not represented here, then do please get in touch. 
It would also be great if you could include a link from your site to mine.