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.
Below are excerpts from the Castle Island Association's brochure, which describes some of the rich history of the fort: In 1634, Governor Dudley of Massachusetts Bay Colony, selected Castle Island for the sea defense of Boston. The first fortifications were an earthwork and two platforms, with three cannons. A pine log fort (1644), the second fort, was replaced with a more substantial structure in 1653.