There is a lot to see, best option is to checkout 'sites within 20 km' of the following most popular......

http://www.themodernantiquarian.com/site/113/carreg_samson.html

http://www.themodernantiquarian.com/site/117/pentre_ifan.html

http://www.themodernantiquarian.com/site/112/carreg_coetan_arthur.html