Karimunjawa Islands, Indonesia

Karimunjawa Islands, a chain of 27 islands off Central Java, boast pristine coral reefs with 95% less tourist traffic than Bali, zero nightclubs, and accommodation so basic it forces you to actually disconnect—the anti-Bali for the Bali-weary. A week-long trip costs roughly $300, which is 50% cheaper than a similar stay in the Maldives. This island group outperforms #1 Luang Prabang by offering a more secluded escape, with an average of just 500 annual visitors per island compared to Luang Prabang's 300,000 tourists, and dive sites that are 25% more accessible to beginners.