The lovely little square is surrounded by many imposing historical buildings (e.g. Church of Santa Maria Gloriosa dei Frari or the San Rocco Church) as well as by many restaurants and bars where you can get some refreshments. The Scuola Grande di San Rocco - where you can see works of renowned Italian artists - is also located nearby.
Wikipedia https://fr.wikipedia.org/wiki/Campo_dei_Frari
Address 2999 Campo dei Frari, Venezia 30125, Italy
Coordinates 45°26'12.993" N 12°19'36.965" E