Pimalai Resort & Spa

Pimalai is Koh Lanta's flagship and the argument that Thailand's quietest big island deserves a luxury honeymoon, with a hundred acres of jungle hillside cascading down to Kantiang Bay in the island's untouched south, with beachside rooms below and infinity-edged pool villas up the slope, sea views that earn the climb, and a hillside spa regularly ranked among the country's best. The resort has matured for over two decades into grande-dame polish — serious restaurants, a dive center for the Hin Daeng season, and service that manages white-glove without stiffness.

The setting does the romance heavy lifting. Kantiang Bay is one of Lanta's prettiest crescents, the island's famous barefoot calm keeps the beach uncrowded even in peak season, and sunset from the upper villas — the Andaman going gold past the bay's headlands — is the nightly event. Couples who found Phuket busy and Samui social tend to land here and stop looking.