Fort Ticonderoga was built by the French and Canadians between 1754-7 in New York State at the intersection of the water highway that connected New France and the British American territories. Because of its position, it was of vital strategic importance, serving as the key to the entire continent. It was captured by the British in 1759 at the Battle of Ticonderoga and then by the Americans in 1775, making it the first American victory in the Revolutionary War. The fort ceased to be of military value after the war and gradually fell into ruin. It was restored in the early twentieth century and now serves as a popular tourist attraction. Find out more about it here.