Waterton-Glacier International Peace Park is a World Heritage site that is the union of the American and Canadian national parks. There is a way to visit both parks on the same day without hopping in a car and crossing the border. If you are staying in the Waterton Townsite, you can take a two-hour boat trip on Upper Waterton Lake, and travel south to Goat Lick, Montana. There you can get off the boat and scout around for a half-hour before heading back. Surprisingly, passengers do not have to go through US Customs as long as they get back on the boat. Along the way, you get some terrific views of the Rocky Mountains with their towering cliffs and rugged snow-capped peaks. Waterfalls can also be seen from the boat. The only problem for photographers is that the cruise leaves at 10:00am, so getting the great early morning light is near impossible. The day we took this cruise, the weather wasn't the greatest, but the scenery made up for that.