Marais Poitevin in Le Mazeau

You're standing in the Marais Poitevin, near the little village of Le Mazeau, right in the middle of what the French call la Venise Verte: the Green Venice. Have a look around. Narrow canals and tiny islets everywhere. And the water is often completely green. That's duckweed, a thin carpet of little plants covering the channels. Hence the nickname.