Similan Islands, Protected archipelago in Phang Nga, Thailand
Similan Islands are an archipelago of eleven limestone islands in the Andaman Sea with sandy beaches and coral reefs beneath the surface. The islands are separated by shallow channels and vary in size, each with distinct geological features and marine habitats.
The area gained national park status in 1982 following scientific surveys that documented its ecological importance. The protected area initially covered nine islands and expanded to include two additional islands later.
The islands have long held importance for fishing communities, though this traditional role has diminished since protection measures began. Today, the rhythm of the place follows visitor seasons and conservation rules rather than local practices.
The best time to visit is between October and May when the sea is calmer and underwater visibility is good. Visitors should plan the boat journey in advance and bring sun protection and swimming clothes.
Each island carries a number from 1 to 11, assigned by park authorities based on conservation needs. These numbers are not displayed on the islands themselves but serve only administrative purposes and visitor management.
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