In this month’s Radar—our unexpected cultural recommendations from friends and colleagues around the world—we look to Venice, soon be thronged with visitors to the 59th Biennale as it finally returns to the international art calendar. Luca Massimo Barbero, a curator and art historian-globetrotter who has lived and worked in Venice for almost 40 years, joins us to offer a few suggestions for wandering off the beaten path, onto the city’s rich and lesser-known byways.