Vitamin D -- specifically the form D3 -- is the only vitamin your body makes itself. It's fat-soluble, which means your body stores vitamin D in its adipose tissue -- in its fat. And, if you want to be specific about things, this vitamin is actually a hormone.
Sullivan's Castle Island, South Boston, MA, Est. 1951. Castle Island. Located at the end of Carson Beach, on Pleasure Bay in South Boston, Castle Island is a 22-acre recreation site, and the site of Fort Independence. Castle Island was really an island until several land reclamations through the years extended causeways and eventually roadways.
The castle in Windham, NH is only approx. 10-15 miles from the one in Methuen, MA. The one in Methuen was built first and the one in Windham was built as a summer home with it's own chapel and large grounds. If you drive through the towns of Windham and Salem, NH and Methuen, MA, you will notice stonewalls.