On our first day we went on a tour to see the floating islands. They are amazingly firm considering they are made of reeds. They are anchored to the bottom of the lake so they don't float away. They are about 2 meters(6 feet) thick. To make them the locals start with a base of reed roots. Then they put layers of reeds on until the island is thick enough. After that we went to a natural island, the second largest on the Peru side of the lake. It is about 7 kilometers long. On the island there is a huge, two storey high building full of the handicrafts the locals have made.