1. The Dewey-Granby Oak is one of the oldest known trees in Connecticut, estimated to be nearly 500 years old! The tree was 300 years old when the United States celebrated its Centennial. Then came the automobile, World War I, electricity, telephones, radio, ... But the Oak remained constant. Its branches are heavy with age and touch the ground. It is alive and healthy, generations of children have climbed its limbs and should continue to do so for many years to come. It's located in Granby, CT. Would you like to visit Connecticut and see this old, majestic oak?