All our Mail Boat day cruises include stunning scenery, spectacular wildlife, and an adventure you will never forget. Discover hidden bays and coves – that most tourists never see. Learn the fascinating history of the characters who live tucked away from the world See local wildlife up close and personal, and learn about rare species that call the Marlborough Sounds home All cruises depart from Havelock (30 minutes from Blenheim, one hour from Nelson)