More than 21km of ice, up to 900m deep, 1,000-year-old trees in the Aletsch forest, an unlimited variety of flora and fauna, impressive 4,000m peaks - an abundance of natural treasures that is hard to grasp. The Aletsch glacier has been the core of the Jungfrau-Aletsch-Bietschorn UNESCO World Nature Heritage since 2001, making it play in the same league as Yosemite National Park, the Everglades, Ayers Rock or Kilimanjaro. www.weltnaturerbe.ch