Almost all rest stops along E4 and the lake Vättern are beautiful and well-serviced.
At this one (south bound) you have this little shop to buy Gränna polka canes if you didn't find the time to buy them in Gränna.
Walk a little bit along the path past the toilets and you will find a few tables with perfect sea view. The path is pretty rough though.
Has toilets. read more