Small, provincial capital turned international travel hub, Krabi serves up a slice of everything Southern Thailand is famous for: emerald seas, palm-fringed beaches, soaring karst cliffs, excellent food, and a laid-back culture. With an international airport, quick access from Bangkok or Phuket, and so many island getaways close at hand, you probably won't spent much time in Krabi Town itself. But if you're arriving direct from an international flight, you might want to pull up a beach chair and stay awhile. Ao Nang, Krabi's main resort beach, can remedy any jet lag with a healthy dose of sun-and-sea. Once you're ready for action, explore the nearby Ao Luk sea caves and mangrove lagoons by kayak, or learn how to rock climb at legendary Railay Beach. Visit Tiger Cave Temple for a dash of traditional culture; or head inland to Waree Raksa Hot Spring and Spa, set in a peaceful rainforest. For all its creature comforts, Krabi mainly serves as a gateway to the Andaman Islands, particularly the popular Phi Phi Islands and the divers' paradise of Koh Lanta. Heading toward Phuket from Krabi, cruise beneath the dramatic limestone cliffs of Phang Nga Bay, taking in Koh Tapu (aka James Bond Island), Hong Island, and Koh Phanak. You could get to most of these by ferry, but a private speedboat tour ensures you receive top-notch service and makes the most of your vacation time. As a bonus, your guide will know the best—and least-crowded—snorkeling spots along the way.