Lago d'Antorno is a picturesque lake surrounded by the Dolomites. It's a short drive away (2 km, ~1 mi) from another famous Dolomiti destination, Lago di Misurina.
On the western shore, there's a chalet of the same name. During summer months, you might even practice sports fishing.
In the vicinity, there're a few hiking trails up the mountains, such as Sorapiss, Monte Piana, Cadini di Misurina, and Tre Cime.