Don't enlarge this picture!About 10 km south of Suk Samran, on Thailands Highway 4 between Ranong and Takua Pa, just north of a bridge, an attentive passer-by will see a wearied and worried signboard, pointing inland, inwards to Suan Mai waterfall, part of Sri Phang Nga National Park, home to many new and unknown waterfalls.
The small road first passes some kampong houses, crosses a bridge and slowly climbs up through rubber and palm oil plantations, interspersed with some durian orchards, ripe for the picking.
The road deteriorates, then improves. After deteriorating again, one needs to continue going straight in a sharp left hand corner. The road gets steep and enters a protected environment with what was once a parking area before a steep hairpin to an office with some tired looking government staff.
After stepping out of the car, one hears the rushing stream. Following a wide track and then a smaller track along a waterpipe, the 10 minute ‘trek’ ends at the foot of a nice 20 m high waterfall, Suan Mai.
Beneath the fall is a great pool to cool off and swim up for a natural back massage. Another nice find.
The surroundings are still very natural and pristine, despite the relative accessibility of these falls from the highway.
Interesting background knowledge is the website of the Andaman coast community tourism. It highlights some lesser well known waterfalls near Kuraburi. Other than this mention there is not much other information on the internet, it's very far away from anything remotely touristic, but as said a great find.