Sure, people say there are a thousand islands along the St. Lawrence Seaway, but is there any way to really be sure? Rising above the St. Lawrence River, this Hill Island, Ontario, observation tower has answered this question for many tourists to the Thousand Islands region of Canada for more than half a century. The completion of Seattle’s Space Needle for the 1962 World’s Fair led to a boom in observation tower construction across American and Canadian cities throughout the 1960s and 1970s. In the Thousand Islands region of Canada,…