2 Best Sights in Canada

Fourteen massive buttresses and 13 gigantic arches line the 702-foot-tall, 4,311-foot-long dam on Manicouagan River. Built between 1959 and 1970, this multiple arch-and-buttress dam is the largest in the world has been a tourist attraction since shortly after construction began. Previously named Manic-5, it contains enough concrete to build a sidewalk from the North Pole to the South Pole. Stand at the foot of the dam or walk the crest. A two-hour guided tour, for ages 18 and older (photo ID required), journeys deep into the belly of operations; email for a reservation.

Yukon Energy built the world's longest wooden fish ladder to facilitate the yearly chinook (king) salmon run around the Whitehorse Rapids hydroelectric dam. The salmon hold one of nature's great endurance records, the longest fish migration in the world—more than 2,000 miles from the Bering Sea to Whitehorse. There's a platform for viewing the ladder, and TV monitors display pictures from underwater cameras. Interesting interpretive exhibits, talks by local First Nations elders, and labeled tanks of freshwater fish enhance the experience. The best time to visit is August, when hundreds of salmon use the ladder to bypass the dam.