A charcoal-colored coast

Indonesia is one of the planet's most volcanic countries, and its famed resort hotspot of Bali is no exception. This surfer's paradise is home to two currently active volcanoes, Agung and Batur, and its past is packed with volcanic activity—nearly every inch of Bali has been covered with magma at some point in geological history. Because of this, highly fertile soil is found all over the island, and black-sand beaches made of cooled and crumbled lava can be found on most every coast. This stretch of obsidian shore is part of Klungkung, Bali's smallest regency, which also includes the stunning Nusa Penida island group.