In Montreal: Fireworks at La Ronde

La Ronde amusement park is host of the Loto-Quebec's International Fireworks Competition. Events are on Wednesdays and Saturdays at 10 pm (rain or shine), with competitors representing a different country each time. This Saturday, July 19, will feature Howard & Sons Pyrotechnics Australia. You may buy a ticket and go watch the fireworks on site, but I would rather suggest you just walk East on Ste-Catherine Street to Papineau Street near the Jacques-Cartier Bridge (it's a nice ~15 minutes walk from the Palais des Congres area) and the whole street is blocked to cars from St-Denis Street. Follow this link to see some gorgeous pictures from this year's previous events.