Lamai is a beach on the east coast of Ko Samui, Thailand.
The southern third of the beach has the widest strip of sand, is the best for swimming, and has the most nearby eating and drinking and shopping options. To the north, the water doesn't get deep enough for swimming until you're quite some distance out, and the further north you go, the narrower and quieter the beach becomes, eventually becoming rocky towards the headland.
Grandfather and Grandmother stones (Hin Ta and Hin Yai) - two stone formations nearby each other - one looking like an erect penis, the other looking like a vagina, hence their names. Located south-west of Lamai Beach, just off the 4169 ring road. There are many souvenir stands there, but most notable is the special candy which visitors can try for free - don't hesitate, it's worth a taste.