Letten is one of the places where Zurich feels most alive in summer. People come here to swim in the Limmat, sit on the wooden decks, meet friends, listen to music and enjoy the sun by the river. I like it because the vibe is social, relaxed and a little alternative, but still easy and welcoming. It is one of the best places to feel local summer life away from the polished postcard version of Zurich.