Yarimburgaz, one of the oldest caves in Europe, is located on the planned Kanal Istanbul route. This cave, which is thought to be 400,000 years old, is considered an important stop for Homo erectus to go to Europe. This cave opened by the water will be under water if Kanal Istanbul is built. In this series, where I examine the relationship between water and civilization, I focused on the forms created by the cave. I wanted to draw attention to the direct relationship of the cave with water.