Not everyone thought it was a great idea to transform an Olympic bicycle-racing stadium into a natural-history exhibit, but the result is one of the city's most popular attractions, part of the Space for Life complex. Four ecosystems—a boreal forest, a tropical forest, a polar landscape, and the St. Lawrence River—are under one climate-controlled dome. You follow pathways through each environment, observing indigenous flora and fauna. New residents of the Biodome are three Lynx kittens born in captivity in 2013. These little cuties are a hit with kids and adults alike. Between its launch in 2014 and completion in 2017, the Biodôme Renewal project will renovate the exhibits, with a focus on humans' relationship with nature. Keep in mind that the tropical forest is as hot and humid as the real thing, and the Québec and Arctic exhibits can be frigid. If you want to stay comfortable, dress in layers.