One of the best places to go in sweden is the high coast. It is a coast line in the east of sweden between Örnsköldsvik and Härnösand (the middle if you mean north to south) that is the highest coast in sweden.
It also has a land uplift of 8mm/year and has done so since the last ice age.
The high coast is a UNESCOs worls heritage site and no wonder. The nature is amasing.
Theres alot to do at the high coast. You can climb Skule mountain, walk in the Skule forest, visit the island Ulvön, walk along the high coast trail, drive along the high coast road, visit Mjältön (swedens highest island) visit the Urkult festival, bathe at Paradisbadet, Visit Hemsö fästing (fort), Kayak along the coast and so much more.
You do not want to miss the high coast
The picture is from the Skule Mountain