When planing a wilderness adventure there is plenty of inspiration to find from national parks. In Sweden there is 30 parks to choose from. As always in Scandinavia, a good rule of thumb is the further north you go the more wilderness you get. Most of the national parks have a visitor center and most are easy accessible even though this vary greatly. All nature types are represented as national parks, from sea to forrest and mountains.
Sarek national park in the far north of Sweden is in the top of many peoples bucket list. It is remote and free from roads and man-made trails. It is also directly connected to three other nationalparks, Stora sjöfallet and Padjelanta in Sweden and Rago in Norway, which makes this one of the largest protected nature area in Europe.
All entry to the natural parks and visitor centers are free of charge but note that there might be some restrictions to the freedom to roam (allemansrätten). For example it can be that you are only allowed to camp in designated areas. For more information refer to nationalparksofsweden.se.