Sa Khu is an area of northern Phuket that covers Nai Thon and Nai Yang beaches, by which names it is more commonly known. It's one of the quieter parts of the island's western coast, fringed with virgin jungle – especially the bit that's protected with national park status. Things get a little noisier just to the north of the park as aeroplanes fly in low to land at Phuket International Airport.
The whole Sa Khu area has a very laidback vibe. Nai Yang is a popular picnic spot with locals but is also home to a few excellent hotels. Past the headland to the south, Naithon has a small village atmosphere, with a few hotels, restaurants and quiet bars by the beach.