Sea caves are natural formations created by the erosion of coastal rock by waves and water. Over time, the constant pounding of the ocean can wear away softer rock, leading to the development of these unique structures. They can vary in size and shape, often featuring stunning rock formations and vibrant marine life. These caves are typically found along rugged coastlines and can be explored by boat or kayak. Some famous examples of sea caves include the Blue Grotto in Italy and the Sea Lion Caves in Oregon. They are popular destinations for tourists and nature enthusiasts alike.