The Natural History Museum and the Aquarium contain many precious treasures recovered from the sea. Livorno is home to the prestigious Naval Academy where Italian Navy officers have been trained for over a century, and which hosts an annual Sailing Trophy with participants from all over the world. Treasures from the sea can be seen in the Villa Henderson, which combines antique finds with modern educational tours, and also has a Botanic Garden. The quarter known as Nuova Venezia (New Venice), built during the 17th century, still preserves some of its original features. Particularly interesting are the Medicean Fossi, a network of navigable canals connecting the warehouses and homes of merchants which, like those in Venice, had entrances at water level leading to rooms where goods were once stored. Piazza della Repubblica is still admired today for its unusual architecture. It is in fact a bridge covering a long stretch of navigable canal.