Hire a Jeep or motorbike and explore the surrounding area of Lamai as there are plenty of interesting attractions to see. Ko Samui's most popular tourist sites are in this locality so if you're getting bored swimming all day, try some exploring around the area instead. The south of Lamai, once you get past the Muslim Fishing village Hua Thanon, is Samui before becoming the popular tourist destination it is now. It gives you a view of lush greenery, livestock grazing in the fields, and little roadside cafes selling drinks and Thai dishes.
Between Lamai and Hua Thanon lies two famous rock formations: Hin Ta and Hin Yai also known as Grandpa and Grandma Rocks. These formations look like the male and female genitalia, respectively. What makes these rocks even more strange is that they are close to each other, giving way to a legend explaining how they came to be.
Near Hin Ta and Hin Yai is a small beach. It is not for swimming but it gives you time to cool your feet. Small souvenir shops sell clothes, postcards, drinks and snacks including the local sweet "galamae". Parking is convenient and viewing these popular formations is free. The setting has been spoiled somewhat by a children's zoo-type goat farm recently. Access to the beach in the direction of the main part of Lamai is not possible; you have to retrace your steps to the Ring Road and access it through one of the resorts along the Ring Road towards Lamai. The commercial area around there is also called Hinta Hinyai, and features a driving range and also the Lamai Post Office.
The Wat Lamai Temple has played host to temple fairs along with weddings, funerals and various religious festivals. It features concerts, fairground games, food and an outdoor cinema, but is normally very quiet, other than the sounds of children playing at the temple school. The temple fairs are week-long celebration and are worth seeing if you happen to be in Lamai during one. The strip south of the corner where the temple is has a number of good tourist souvenir shops and also French bakeries and other eateries, as well as Thai service businesses as is also the case with the strip from the temple corner back towards Tesco and the gas station and beyond.
The cultural hall within the temple contains a collection of artifacts from Samui's past. The collections range from brass and earthenware containers to a 2,000 year old metal ceremonial drum dug out of a Lamai village. Like other wats on Koh Samui, the temple has a mummified monk but fittingly doesn't make a big deal out of "him".
Wat Khunaram, which is past Hua Thanon towards Na Mueang, houses the body of one of Samui's most famous mummified monks, Loung Pordaeng. Loung Pordaeng passed away 20 years ago and, at his request, his body was placed in a glass case. His body has remained in the specially-made glass case since his death and amazingly, shows few signs of decay.