A newly identified fault that runs under the Adriatic Sea is actively building more of the famously beautiful Dalmatian Islands and Dinaride Mountains of Croatia, according to a new research report. Geologists had previously believed that the Dalmatian Islands and the Dinaride Mountains had stopped growing 20 to 30 million years ago. The Croatian coast is an increasing popular tourist destination. Dubrovnik, known as “the Pearl of the Adriatic,” is a UNESCO-designated World Heritage site.