The Thousand Islands is the name of an archipelago of islands that straddle the Canada-U.S. border in the Saint Lawrence River as it emerges from the northeast corner of Lake Ontario. They stretch for about 50 miles (80 km) downstream from Kingston, Ontario. The Canadian islands are in the province of Ontario, the U.S. islands in the state of New York. Around twenty of these islands form the St. Lawrence Islands National Park, the smallest of Canada's national parks. The Thousand Islands-Frontenac Arch region was designated a World Biosphere Reserve by UNESCO. The U.S. islands include numerous New York state parks, including Wellesley Island State Park, and Robert Moses State Park - Thousand Islands located on an island in the St. Lawrence.
Popular boating, fishing and vacationing locations
- One of the few beaches in the Thousand Islands, Potter's Beach on the American Grindstone Island has a fine, shallow sandy bottom with a very gradual slope, perfect for boaters that want to stretch their legs or socialize.
- A popular location for swimming or anchoring out of the wind, the Lake of the Isles is a secluded area cut off from the rest of the St. Lawrence River by Wellesley Island and neighboring Canadian Hill Island. Access is limited through two narrow passages.
- Known for its fishing, Eel Bay is a shallow bay just southwest of Wellesley Island. From the air, the bay can resemble the Caribbean with a turquoise-tinted crystal clear water and sandy bottoms.
- Boldt Castle, a testament of one man's love of his wife, has been under renovation by its owner, the Thousand Islands Bridge Authority since 1977, and can be visited by boat or tour cruise. This 120-room mansion and surrounding grounds are available for touring, and is also available for wedding ceremonies.
- The Antique Boat Museum in Clayton houses exhibits antique wooden boats used or built in the region. The museum also features exhibits on the region's maritime culture and is home to the LaDuchess, George Boldt's luxury houseboat.
- Though not as famous as George Boldt's Castle, Singer Castle on Dark Island is privately renovated and is open to tourists. Frederick Bourne had his castle constructed with secret passageways so that he could spy on his guests.