12 Emerging Southeast Asian Islands That Belong on Your Must-Explore List

2. Derawan Island, Indonesia

Set off the southeast coast of Kalimantan, Derawan Island draws in-the-know travelers with its thriving marine life, peaceful vibe, and rustic charm. This island isn’t swarmed by mass tourism—instead, expect stilted wooden bungalows above translucent turquoise water, sleepy fishing villages, and endless horizons dotted with passing sea turtles. Divers and snorkelers are in for a treat: Derawan’s reef systems host vibrant coral, manta rays, and, most notably, seasonal gatherings of giant turtles. The island has started embracing eco-tourism, with local initiatives working to protect its pristine environment. Strolling along quiet beaches at sunset, you’ll catch a glimpse of local life unfolding at the pace of the tides. Getting there is an adventure of its own: fly to Berau Airport, then hop on a speedboat for the last stretch. The best underwater visibility is from June to October, but relaxed days await year-round. If you want authentic Indonesian island life with a dose of wild beauty, Derawan is emerging as a beloved escape for divers and nature lovers alike.