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.
Castle Rock, Maine. Castle Rock is a town in Maine that has served as a nexus for paranormal, supernatural, and metaphysical events. The town shares a border with Chester's Mill, though the boundary became blocked by an invisible barrier on Dome Day. The population of Castle Rock was 1,280 by 1959 and around 1,500 as of 1991.