San Polo is a vibrant district centered around the much-photographed, shop-lined Rialto Bridge, and the Rialto Market, where stalls sell fish, fruit and vegetables. Nearby, in the canalside Erbaria area, locals meet for aperitifs and “cicchetti,” or small plates, before heading to dinner at trendy eateries. The Basilica dei Frari houses masterpieces by Titian and other Renaissance artists.