Castles wealth and water thats what this informative 3 hour 30 minute tour on the st lawrence river is all about cruise the wide island filled river puttering along the canadian shore as a guide describes the intriguing history of the area and some of the rich and famous people who have settled here through the decades dock at heart island and walk to where the imposing boldt castle sits take a self guided tour of the castle admission charge not included or just explore the island befo