Sirmione Historic Center - After visiting the Castello, take a stroll around the old town of Sirmione. There are shops, restaurants, gelaterias, pizzerias and beautiful architecture. Be sure to take in a passaggiata (stroll) at dusk to Piazza Callas and its pier that juts out into the lake.
Archaeological site of Grotte di Catullo - Ruins of a sizable Roman villa on a peninsula with an olive grove & a nearby archeological museum. Can get crowded in high season but worth a visit.
Camping Village San Francisco
Mantua & Peschiera del Garda - Mantua is a wonder town surrounded by manmade lakes which create a huge moat. Peschiera del Garda is a "water" town--surrounded on all sides by the River Mincio which connects to the lake.
Lake Garda Cruises