Ko Phi Phi Don is the largest and only permanently inhabited island in the Phi Phi Islands, located in the Andaman Sea in southern Thailand. Known for its dramatic limestone cliffs, turquoise waters, and compact landmass, it serves as the main hub for tourism, accommodation, and local life in the archipelago.

The island has a distinctive double-bay shape, with Tonsai Bay and Loh Dalum Bay separated by a narrow strip of land. This central area is where most shops, restaurants, and guesthouses are concentrated, creating a lively pedestrian-focused village atmosphere. Beyond the settlement, steep jungle-covered hills rise quickly, leading to viewpoints and hidden coves that overlook the surrounding sea.

Today, Ko Phi Phi Don is one of Thailand’s most visited island destinations, popular for boat tours, diving, and beach activities. While it is known for its vibrant tourism scene, it also reflects the challenges of balancing development with environmental preservation in a small island ecosystem. Its combination of dramatic scenery and compact, walkable layout makes it the heart of the Phi Phi Islands experience.