The Blue Grotto was a world heritage site in Malta. Hundreds of thousands of folks who visited the island took uphill and climbed on its rock which span roughly 200 yds from one side to the other. During a storm in March 2017 one of the most beautiful sites collapsed. It was sheer of luck that nobody was present. The sea below would have swallowd anyone in seconds ... It was a sad moment for Maltese and Tourists worldwide... as seen on youtube : 5qWgqcr27R0