The Su e zo per i ponti (Up and Down the Bridges in the Venetian language) is a non-competitive walk held in Venice in April.
The walk starts in the Piazza San Marco, in front of the Doge's Palace.
Walkers follow a route characteristic of the city, which leads them through calli (streets), campi (squares) and ponti (bridges).
Social Youth Tourism), a non-profit organisation founded by a Salesian of Don Bosco, Dino Berti,[2] who has started the Su e Zo walk in 1975.
The revenues from starting fees are donated to charity projects, often in developing countries such as Peru, Brasil, Syria, Etopia, Haiti or the earthquake affected town of L'Aquila.