10 Secret Islands in Southeast Asia Even Locals Don’t Know About
Southeast Asia is famous for its postcard-perfect beaches and bustling island hubs like Bali, Phuket, and Boracay. But beyond the well-trodden tourist trails lies a constellation of hidden gems—remote islands so secluded that even many locals haven’t heard of them. These untouched paradises offer pristine nature, rare wildlife, and a chance to disconnect from the modern world. Let’s set sail to uncover 10 of these secret islands, where adventure and serenity collide.
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1. Mergui Archipelago, Myanmar
Hidden in Plain Sight
Tucked between Myanmar and Thailand, the Mergui Archipelago comprises over 800 islands, most of which remain uninhabited and unnamed. Accessible only by permit (obtained through licensed tour operators), this region is a time capsule of raw beauty. The Moken people, a nomadic sea tribe, are among the few who call these waters home.
Why It’s Secret: Strict travel regulations and limited infrastructure keep crowds at bay. Even in Myanmar, few outside the southern regions know about these islands.
Don’t Miss: Kayaking through mangrove forests, diving at Shark Cave, or camping on a deserted beach under starry skies.
2. Togean Islands, Indonesia
A Bioluminescent Wonderland
Nestled in the heart of Sulawesi’s Tomini Bay, the Togeans are a diver’s dream. The islands are fringed with coral reefs teeming with pygmy seahorses and barracuda. But the real magic happens at night when the waters glow with bioluminescent plankton.
Why It’s Secret: Reaching the Togeans requires a 10-hour boat ride from Ampana—a journey few travellers attempt.
Local Insight: “The jellyfish lake here is one of only a few in the world where you can swim without fear of stings,” says marine biologist Dr Fitriani Basiya.
3. Calaguas Islands, Philippines
Boracay’s Untouched Cousin
Forget crowded White Beach—the Calaguas, a 12-hour drive from Manila, offer powdery sands without the crowds. Tinaga Island’s Mahabang Buhangin Beach rivals any Caribbean shoreline.
Why It’s Secret: Limited electricity and rustic homestays deter mass tourism. Locals from Luzon often overlook these islands for more accessible spots.
Pro Tip: Pack a tent and camp under the stars.
4. Koh Bulon Leh, Thailand
The Quiet Neighbor of Koh Lipe
While tourists flock to nearby Koh Lipe, Koh Bulon Leh remains a sleepy paradise. Think bamboo bungalows, crystal-clear snorkeling lagoons, and zero ATMs.
Why It’s Secret: Overshadowed by Thailand’s better-known islands, Bulon Leh is a haven for backpackers and eco-travelers.
Unique Trait: The island’s only village, Bulon Sayam, runs on solar power.
5. Anambas Islands, Indonesia
The Maldives of Southeast Asia
Located in the South China Sea, the Anambas are a cluster of 255 islands with turquoise waters and luxury eco-resorts. The marine biodiversity here rivals Raja Ampat.
Why It’s Secret: Accessible only by weekly flights from Jakarta or Batam, these islands are a well-kept secret among Indonesian sailors.
Stat Alert: Less than 1,000 international tourists visit annually.
6. Banyak Islands, Indonesia
Surfers’ Best-Kept Secret
North of Sumatra, the Banyaks are a surfers’ Eden with world-class waves like Pinnacles and Hole. Beyond surfing, the islands boast untouched jungles and turtle nesting sites.
Why It’s Secret: Limited transportation (only chartered boats from Singkil) keeps the vibe exclusive.
Local Lore: Fishermen here still use traditional jukung boats to navigate the swells.
7. Con Dao Islands, Vietnam
History Meets Wilderness
Once a penal colony, Con Dao is now a national park where jungle treks lead to hidden waterfalls and empty beaches. Endangered dugongs and sea turtles thrive offshore.
Why It’s Secret: Many Vietnamese associate Con Dao with its dark past, overlooking its natural beauty.
Insider Tip: Visit between April and November for the best snorkelling conditions.
8. Natuna Islands, Indonesia
Geopolitical Paradise
Near the contested South China Sea, the Natunas dazzle with granite cliffs and neon-blue waters. The islands are also home to the rare Natuna leaf monkey.
Why It’s Secret: Military presence and remote access (4-hour flights from Jakarta) deter casual visitors.
Did You Know?: Natuna’s air quality ranks among the cleanest in Southeast Asia.
9. Layang-Layang, Malaysia
The Diver’s Holy Grail
This tiny atoll, 300km off Sabah, is a hotspot for hammerhead sharks and manta rays. With just one resort, it’s a sanctuary for serious divers.
Why It’s Secret: Layang-Layang is primarily a military outpost, with tourism as a side gig.
Expert Opinion: “The wall dives here are unmatched in the region,” says dive instructor Raj Patel.
10. Apo Island, Philippines
Marine Conservation Success Story
Tiny Apo Island, off Negros, is a model for community-led conservation. Its protected reefs swarm with sea turtles and clownfish.
Why It’s Secret: Overshadowed by nearby Dumaguete, Apo sees just 50 visitors a day.
Sustainable Tip: Hire local guides—their efforts fund the marine sanctuary.
Conclusion: The Call of the Unknown
These secret islands remind us that discovery is still possible in a world that feels increasingly mapped. Yet with their fragility in mind, travelers must tread lightly—supporting local communities and minimizing environmental impact. Whether you’re diving into untouched reefs or swapping stories with sea nomads, these hidden corners of Southeast Asia promise adventures that linger long after the tan fades.
So, ready to trade Instagram crowds for footprints in virgin sand? The secret’s out—but only just. 
