The Phi Phi Islands are an archipelago made up of Koh Phi Phi Yai to the north and Koh Phi Phi smaller to the south, along with four other smaller islands. Designated a national park in Thailand in 1983, these sun-drenched islands are dotted with powdery white beaches, azure waters, and numerous natural caves and unspoiled natural features that have made them one of Thailand’s most popular destinations in recent years. The dreamy blue seas were featured in the Leonardo DiCaprio film “The Beach.”