Looking great so far. You've given yourself quite a huge time frame for when to finish it now though :)

Being druids, they have access to the control weather spell. Maybe they keep each of the four villages is like that year round? ;-)

Come on, we all know you can never do just one.....

Maybe it was built in preparation for a submersible to be invented? Therefore they're not exactly sure where to place equipment and railings and such yet?

Welcome back to the future, where people use the magic of technology to see as well during nighttime as day.