Heart Island is a small island located in the Thousand Islands region of the St. Lawrence River in New York. It is known for its unique heart shape, which has made it a popular spot for tourists and romantics alike. The island is home to Boldt Castle, a historic mansion built in the early 1900s by hotel magnate George C. Boldt. Visitors to Heart Island can explore the castle and its beautiful gardens, which offer stunning views of the surrounding river. The island is accessible by boat, and many people enjoy picnicking or taking photographs of the picturesque scenery. It is a charming destination for those looking to experience the natural beauty of the area.