Venice and its lagoon landscape is the result of a dynamic process which illustrates the interaction between people and the ecosystem of their natural environment over time. Human interventions show high technical and creative skills in the realization of the hydraulic and architectural works in the lagoon area. The unique cultural heritage accumulated in the lagoon over the centuries is attested by the discovery of important archaeological settlements in the Altino area and other sites on the mainland, which were important communication and trade hubs.