Lake Ontario borders Canada and is the 13th largest lake in the world. The water is fairly cold, especially in the winter so you’ll want a thick wetsuit or drysuit for diving here.
Keuka Lake is one of the Finger Lakes of New York. There’s always something to be found at the bottom of the Finger Lakes from 18th-century glass bottles to old jewelry and even old fossils. Visibility is best in the spring and fall but the water is pretty chilly so bring a thick wetsuit!