[SeoxyS]

In Bern, there's a "pool" I used to love going to. It's got normal pools, but there's also the opportunity to jump into the river, where the currents will easily carry you half a mile in no time.

http://www.bern.com/en/activities/adventure-fun/river-swim/m...

https://www.youtube.com/watch?v=8Dc1vmzjwJE