Kalmar Nyckel Sails & Tours: Sail and explore the replica Swedish tall ship on day sails in New England, river cruises and pirate sails. Unforgettable experiences for the entire family on this vessel known as the Swedish Mayflower. The original Kalmar Nyckel was one of America’s pioneering colonial ships, bringing settlers who founded the colony of New Sweden in 1638 and established Fort Christina, the first permanent European settlement in the Delaware Valley.