Kampong Ayer is like a big village on water. It's located in Brunei and is made up of lots of houses and buildings on stilts that are built over a river. Imagine a big boat that is made up of lots of smaller boats all tied together.
People have been living in Kampong Ayer for hundreds of years. They have their own community, with schools, markets and even a hospital. They use boats to get around and they can fish right from their houses!
It's really amazing to see all of the houses and buildings built over the water, but it can also be a bit scary for someone who's never been there before. That's why it's important to be safe and listen to the local people who know the area really well.