Deep in Indonesia’s eastern Papua region, this archipelago of 1,500 islands, entirely within the Coral Triangle, boasts some of the world’s richest marine biodiversity. Raja Ampat has four main mountainous islands: Wayag offers the most iconic views of the seascape, while Tomolol has incredible sea caves with ancient paintings of human palms and animals still intact today. The Ayua islands consist of small spits of land across a large atoll, many connected by natural sandbars and full of vegetation and fauna entirely unique to the region. Scuba diving and snorkeling are among the most popular activities, along with bird watching, sailing, learning traditional Papuan fishing, waterfall trekking and cave exploration. If you’re visiting during the end of the year, head to East Waigeo to experience the ‘Sea Ghost’, a natural phenomenon of light across the ocean’s surface for 10-20 minutes.