Alexandria Bay has cultural and historical characteristics that are regularly maintained. Boldt Castle is located here as well as the Antique Boat Museum.
The castle was started in 1900 as a gift from George Boldt to his wife, Louise. Unfortunately, Louise died in 1904 and construction ceased at that time. The Thousand Islands Bridge Authority acquired the property in 1977 and began to restore and repair the property so as to open it to the public.
Narrated tours of the Thousand Islands and the area around Alex Bay are featured by Empire Boat Lines. Some of the sights include the shortest international bridge and Boldt Castle.
The nature center is found within the Wellesley Island State Park. It is a 600 acre wildlife sanctuary with 8 miles of trails. The visitor center has nature exhibits and trails for cross-country skiing.