The photo was taken on the lovely island of Torcello which is in the lagoon north of Venice. Once heavily populated, it now has very few inhabitants. It does have an interesting history The forgotten Venice and the ancient Cathedral of Torcello among its attractions.
The photo shows the containers that are used twice a year to provide the soft shelled delicacy know as moeche. These containers, known as vieri, used to be made of wicker. Now they consist of wooden planks, spaced so the water can circulate to keep the little crabs alive when the containers are lowered into the shallow waters of the lagoon.
I have eaten them once. Then I found out how they are prepared, and never had them again. Poor moeche