Montreal has many beautiful churches (Montreal is referred to locally as 'the city of a hundred churches'), including the largest church in Canada, and also many important art, history, and science museums. You can also visit the location of the 1967 World's Fair, where today, as well as many other attractions, one will find the Circuit Gilles Villeneuve Formula One automobile race course. Also of interest is the site where the 1976 Summer Olympic Games were held, and the modern architecture of the Olympic stadium (the 'Big O') and its tall inclined observation tower (the highest inclined tower in the world); now a landmark of Montreal.