Standing on top of Suur Munamägi, the highest point of Estonia, Taavi Pae got a glimpse of what it must feel like to be a real mountaineer. Pae, the president of the Tartu Students’ Nature Conservation Circle, felt dog-tired after battling knee-deep snow, freezing temperatures, and the absence of proper trails. Together with 39 other students, he had just skied more than 25 kilometers (15 miles) in the country’s hilly south, climbing Estonia’s 20 highest peaks in the process. Suur Munamägi, or Big Egg Mountain, was the symbolic finish line….