Tonlé Sap Lake near Siem Reap, Cambodia is a seasonally inundated freshwater lake. This means it grows and shrinks with the monsoons. Its surface area ranges from 1,000 square miles to 6,200 square miles! During the monsoon season, the houses above and many like it are surrounded by water and rely on boats for transportation. When the lake shrinks, the stilts become apparent and little islands of houses appear. We visited during a dryer period and were able to walk around one of the islands.