Sea Cave

A sea cave, or littoral cave, is a cave formed mainly by the erosive action of ocean waves. Sea caves actively form along present day coastlines and also survive as relict caves on shorelines the sea has since abandoned. Some of the largest wave cut sea caves in the world sit on the coast of Norway, now stranded 100 feet or more above current sea level, yet are still classed as littoral caves. In places such as Phang Nga Bay in Thailand, caves originally dissolved out of limestone by fresh water have since been flooded by rising seas and are now also being reshaped by wave erosion, a new phase in their enlargement.