Honestly I've been thinking about putting some standing stones in my yard to act as solar clock and calendar, maybe doing a lunar calendar as well...
replyI don't that's against code (yet).
All the best for your Stonehenge.
replyJust knowing that the Sun doesn't really rise on the East (barring exceptions) is a fun reward in itself.
Solarigraphy and Analemma tracking are great fun if you have the luxury of an undisturbed access to the skies.