Multiple choice general knowledge Where is the Blue Grotto located? Barringer Crater Waitomo Caves, New Zealand The Island of Capri, Italy Petra in southern Jordan Reveal answer Fill a bubble to check yourself C Correct answer Explanation The Blue Grotto is a famous sea cave on the coast of the island of Capri in southern Italy, known for its brilliant blue water caused by sunlight passing through an underwater cavity. It is a popular tourist attraction accessible by boat.