Phuket, a rainforested, mountainous island in the Andaman Sea, has some of Thailand’s most popular beaches, mainly situated along the clear waters of the western shore. The island is home to many high-end seaside resorts, spas and restaurants. Phuket City, the capital, has old shophouses and busy markets. Patong, the main resort town, has many nightclubs, bars and discos.

Krabi, on southern Thailand’s west coast, is a province characterized by craggy, sheer limestone cliffs, dense mangrove forests, and more than a hundred offshore islands. Some of its most popular beach destinations include the Phi Phi Islands, which jut from the sea like giant rainforested boulders, and Railay Beach, accessible only by boat and a prominent rock-climbing spot.