Thailand's romantic register moves between the tropical and the specifically Thai in ways that have made it one of the world's most visited honeymoon destinations. The Koh Lanta or Koh Yao Noi island format — a wooden villa above the Andaman Sea, a longtail boat transfer, and a beach that requires the tide chart to find at the right moment — provides the island honeymoon at its most specific. A Chiang Mai cooking class for two, in a traditional compound with a garden of the herbs used in the morning's market, is a shared activity that produces a dinner of considerable quality and a continuing skill. A Sukhothai Historical Park bicycle ride at sunset, through the ancient Siamese capital with its lotus ponds and seated Buddha statues in the failing light, provides the cultural landscape register. A river Kwai raft house overnight, floating on the forest-shaded river with monitor lizards on the bank, extends the circuit. That's where the magic happens.