See the road to Memories from a motorbike on this movie.
From Phuket and Khao Lak in the south, turn left 200 meters after the gas station. If you come from Takuapa in the north, drive past 7-Eleven and turn right where the elephant camp is. The road goes from where the elephant camp is and is around 2,5 km. The road is long but senic, and after a lot of curves you will be at the fantastic Memories Beach.
From Khao Lak, continue straight ahead after you pass the elephant camp. Turn left after next 7 Eleven. You will see signs for Apsaras. It is around 4 km from main road to the sea. Turn left when you arrive to the sea and follow the beach until you reach Apsaras. Park and walk over the river or take the bridge.