Midsummer & midnight in Finland. In case you need a reference for Kris and Talia's lake. Imagine a short redhead pushing a poetically good-looking guy into the water and then swimming in circles around him.
Kungsleden Trail, Sweden, Lappland (they often market themselves as the mountain trail where you don't need to bring anything to drink as there are brooks with drinkable glacier water along the whole trail.) Oh, how Beautiful and challenging too!