BOOKING HOTELS DIRECTLY gives the cheapest rates. Cut out middlemen, save the hotel money and some will give you the best discount. True Beachfront shows Samui hotels that GUARANTEE the best discount for Direct Bookings. See the list on the Samui map page.
This site also sells the cheapest beach rooms available in Thailand as Discount Room Vouchers – but these are limited . See all Koh Samui deals here or e-mail Jade for advice on jadebeachfront@gmail.com

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Lamai Far South displays the southern 650 metres of Lamai's two-kilometre long, main beach. Here is more of the classic beach beauty that made Lamai famous, though it has an added feature that some think makes it the most beautiful sector of all – huge granite boulders sticking their heads out of the sand and water like tropical icebergs. At the very bottom of the beach the rocky headland has scattered these bus-size boulders all about, creating pretty pools and special places to play and swim. Beachfront resorts line virtually all of the beach here, though most are low-density with lots of open space.
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That southern headland also holds one of the island's most iconic landmarks, the famous 'Grandfather and Grandmother rocks'. These two, which resemble the genitals of man and woman, are a major draw for local tourists, who come and go by the bus load through the holiday seasons.
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The sand here is mostly very coarse, comprised of granite particles. But it does not worry many people, for the overall scene is very pretty. As the number of hotels on the beach suggests, this is not one of Samui's quiet beaches, though it is never as busy or crowded as Chaweng. See more photos at Guide to Lamai Beach South.
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Some of the other pages about Koh Samui, and other beach destinations in Thailand, might prove helpful:

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by John Everingham

need advice about Thai beaches & beachfront hotels – try this expert, for free
Want help? E-mail John E, who has photographed 1,100+ beachfront hotels in this site and most beaches in Thailand, for help finding the perfect beach and beachfront hotel. john@beachf.com