Khao Sun Sea of Mist

Khao Sun rises to 510 metres in Chawang district, Nakhon Si Thammarat, and on the right mornings the valleys below vanish under a solid layer of cloud while the summit sits in clear air above it — southern Thailand’s version of a sea of mist. It’s a former tungsten-mining site, worked from the late 1960s into the early 1980s, now repurposed as a viewpoint with old mine tunnels visible on the lower slopes.

A paved road has run to the top since the 1960s, roughly 7 km from the base, but it’s a proper mountain climb — steep grades, blind switchbacks, and a drainage channel running alongside parts of the road that leaves little margin for error. Confident drivers manage it in an ordinary car; if you’re not one of them, arranging a local pickup or songthaew for the ascent beats risking it in the dark before sunrise, which is when you need to be up there. The mist typically forms overnight and burns off within an hour or two of sunrise, so arriving at first light is the whole game — a mid-morning start usually means arriving to clear valleys instead.

From the top, the view runs 360 degrees over the surrounding hills, planted in places with rubber and fruit trees right up toward the summit. Three satellite peaks sit near Khao Sun itself. Temperatures at elevation before sunrise can drop noticeably compared to the lowland heat, so a jacket is worth carrying even in a country that rarely feels cold.

Insider Tip: Book a local pickup the night before if you’re not driving yourself — songthaew and motorbike-taxi operators in Chawang know the pre-dawn run and it’s far less stressful than finding the switchbacks in the dark.

Watch out: Don’t plan this as a casual drive-up. It’s a pre-dawn mountain ascent on a narrow road, and arriving after sunrise means a high chance of missing the mist entirely.