Avebury...
Because that's where we meet the Modern Antiquarians.
http://www.themodernantiquarian.com/site/23/avebury.html

Brogar
Because the full moon was rising as someone piped down the sun.
http://www.themodernantiquarian.com/site/388/ring_of_brodgar.html

Su Tiempesu, Sardinia
(Hope no one will mind my breaking the rule. I can't find this sacred well on MA, but assume I just don't know well enough how to search.)
Because we could dabble our fingers in the water.