It's hot and you've been hiking, mountainbiking or climbed all day. You are a five minute walk from the cabin down to the waterfall for a swim in the crystal clear water and a refreshing shower in the waterfall.

To bathe in the mountains sounds cool for a typical Swedish but it it is not so dangerous, over the summer are the water temperature tends to go up to 19-20 degrees in the lakes and around 15-16 in the rivers, really refreshing that is. 
There are several really nice beaches around the lake Vasetfjället and Fagernes. 
The river outside the cabins offers several nice places to swim on. 150m from the cabins, you will find a path down to the right there are three smaller dams in the river where it is wonderful to take a refreshing dip on a hot summer day. 
If you continue down the road for about 600m you will reach a large dam with an amazing waterfall where there is excellent swimming.

Bathing in waterfalls only 5 minutes from the the cabin
A swim after today's hike
Bathing in the river small pots just 100m from the cabin