Built in the early 20th century in the middle of Heart Island, Boldt Castle is one of the main tourist attractions of the Thousand Islands in the Saint Lawrence River.
George Boldt began building the 120-room castle in 1900 for his wife, and when she died four years later all work on the building stopped. It was left empty and open to the elements for more than 70 years. The castle was purchased in 1977 and has been restored as a local attraction. The first floor of the castle is meant to show how the Boldt family would have decorated it, had they ever moved in.
The castle itself sits in the middle of Heart Island, but there are other buildings that make up the estate – including a castle-like “power house” with a small stone bridge and a tower building at the water's edge that was originally designed to be an entertainment area for guests.
Visitors get to Heart Island by boat (if you own a boat, you can dock there for free) from either the U.S. or Canada, and some of the grounds and buildings are open to the public. Entry to these areas is $8.50 for adults and $6 for children ages 6-12. The castle is open for self-guided tours from mid-May through mid-October; the open hours vary by month, but it's typically open between 10-11am and closes between 5-7:30pm.