Stilts have been around for thousands of years. Believed to have originated in China to traverse through flooded land. They are also used to celebrate the receding floods using colourful costumes, singing and dancing.
Fishermen's shacks Houtman Albrohos archipelago (possibly Beacon Island). Occupied with their families (there's even a school there) for only a few months each year; no one else allowed to land or stay.