Thailand features more than 1,500 miles of coastline spanning the Gulf of Thailand and the Andaman Sea. Two of the most popular seaside escapes are Phuket and Krabi. Generally speaking, Phuket is more crowded and commercialized while Krabi is quieter and less developed. If you prefer entertainment, nightlife, and a social vibe, Phuket is the better destination. Krabi features incredible vistas and arguably better diving. (And for family travel? Phuket offers more kid-friendly attractions and dining options.)