The island is part of the Angthong Marine National Park and is just a couple of hours by boat from Ko Phangan and Ko Tao, so there are ample opportunities for exploration and activities, including kayaking, snorkeling and diving.
Where to Stay
Samui used to be known as a backpacker destination but these days luxury resorts seem to dominate the available accommodations. If you're looking for something luxurious and very modern, the Library in Chaweng is an excellent choice, though the sleek design and clean lines scream sexy a bit more than romantic. There are plenty of more traditional resorts on Samui. The Anantara in Bophut uses Thai-style design throughout and has romantic, lush gardens.
If you want to combine romance, relaxation and a touch of healthy living, the island is also home to a number of yoga retreats and wellness spas, including Absolute Yoga, which has a lovely resort that's also reasonably priced, and the luxurious Kamalaya which is more pricey but also more secluded.