A cavana is a covered shelter for boats. They are typical of the city and lagoon of Venice.

A traditional wood-and-straw cavana in the Venetian Lagoon photographed by Paolo Monti in 1955.
Cavana for the fire brigade service on the river Novo

The word is thought to come from the Italian word 'capanna' meaning hut: the oldest depictions are represented as shelters covered with straw-like huts. Over time, shelters of this kind were also made in the body of buildings, palaces or usually used for storage, on the side facing a small river.