Lake Titicaca

The world's highest navigable lake at 3,812 metres above sea level, Lake Titicaca straddles the Peru-Bolivia border and contains the Uros people's 42 floating reed islands, constructed from totora reeds that require constant replenishment as the bottom layers rot. The Uros have lived on floating islands since the 15th century to escape the Inca expansion, and their way of life -- sleeping on reed matresses, cooking on reed stoves, fishing from reed boats -- is one of the most distinctive in the world.