We"re seeing a vivid "pink moon" rise above St. Michael"s Mount—a granite-encrusted isle connected to the rugged peninsula of Cornwall, England, by sandy flats and a man-made causeway that submerge at high tide. The same order of monks that established France"s Mont-Saint-Michel built a church and priory here in the 12th century. In ensuing centuries of war, the insular monastic outpost was fortified into the imposing castle we see today. Privately purchased in 1659, the mount was opened to the public in 1954—and is still managed by members of the family that bought it over 350 years ago.