The Swiss National Park (SNP) is very much an insiders tip for some of the most beautiful and rugged part of the Swiss and Italian alps. It lies along the side of the road from Zernez to Ofenpass/Fournpass. Unlike much of the rest of Switzerland it is deliberately left undeveloped - so you will not find cable cars, funiculars or restaurants on the tops of mountains. But that is not a bad thing. There is a paved mountain pass road through the SNP which allows access by car or by regular post-bus (at least once per hour). There are also two restaurants and a hotel by the side of the access road. You access the park via one of several parking spots and can enjoy the 21 designated hiking paths through some of the most stunning and diverse mountainous countryside. There are hiking paths to suit your experience and fitness levels, ranging from easy, medium to significant alpine experience required. Being a nature reserve there are a number of rules that apply (and are enforced quite strictly): No going off the designated (well signed) paths, no making unnecessary noise (to protect the wildlife and ensure you see it up close), no littering, no dogs, no mountain biking inside the park itself. Because it has been protected for over 60 years you can encounter all sorts of wildlife - a range of birds, chamois, ibex, deer, marmots, squirrels and adders. You may purchase maps and route descriptions from the SNP office (the Nationalpark-Haus in Zernez) which helps pick the best hikes for your fitness levels. It is highly recommended you have proper hiking boots for the medium or harder hikes - I would say minimum ankle high outdoor shoes. Do bring a rain jacket (the weather can turn quickly in the alps and it gets windy) and plenty of food and water for any hikes. The route profiles are very useful to work out the distance and length of a trail. Hike duration estimates are pretty accurate but assume you do not take many breaks or stop for photos. In my experience you do want to do that though. It is too pretty just to race through. So a 2-3h designated hike can take you as much as 5h if you take your time.