Ko Na Kha Yai, part of the Na Kha Islands off the coast of Phang Nga, is a lesser-known destination ideal for eco-tourism and private retreat developments. The island’s pristine beaches, clear waters, and rich marine life make it an attractive location for boutique resorts or exclusive private estates. With limited development so far, Ko Na Kha Yai offers a unique opportunity for investors seeking untouched natural beauty and seclusion in one of Thailand’s emerging destinations.