The man-made floating islets, which are home to the indigenous Uros people, are created by stacking layers upon layers of totora roots and reeds. This water-resistant plant grows in the lake and is the lifeblood of the Uros community: it is used to make boats, houses, roofs, mattresses and more. The plant is also eaten (playfully called the "lake banana") and applied as medicine, and its flowers are used to make tea.