Accessible by water taxi, tour boats and private boat, the castle is open for self-guided tours from mid-May through mid-October. The five-acre island is fully handicapped accessible, several picnic areas, a gift shop, and a food and beverage concession. There are six impressive structures to explore on Heart Island - Boldt Castle, the Power House, the Alster Tower, the Hennery, the Arch, and a stone gazebo. Exhibits in the various structures and a 15 minute video presentation offer a look into the lifestyle of George and Louise Boldt, along with a history of the 1000 Islands region and the restoration efforts on Heart Island. In Boldt Castle the first floor exhibits are dedicated to the lives of George and Louise Boldt and the development of the 1000 Islands. The second floor of the Castle features Schloss Studio, with hand-detailed ceramic tiles, plates, and sketches.