These unique caves were created by physical erosion and are made of rocks and sandstones that formed 250 million years ago. The landscape around the caves is affected by the high and low tides cycle of the Fundy Bay, which has the highest tides in the world. Specifically, during low tide, you can walk on the ocean floor to the caves and go inside. When the high tide (which can reach to 11 meters high and up) comes in, the ocean floor disappears and the caves are fully submerged in water.