Most of the popular beaches of Thailand are strung along the southern part. Despite its commercialisation, Phuket remains the biggest draw, easy air access being one of the main reasons. Public transport is a convenient way to get around Thailands largest island. A radial network of songthew (converted pick-up trucks that serve as a bus) connects the town with the beaches, which lie on the west coast (a place that was badly hit during the 2004 tsunami). Some of the popular beaches include Patong (known for its nightlife), Karon, Bang Thao, Kata, Mai Kho, etc. Ya Noi offers good snorkelling opportunities. Chalong Bay is a popular diving site. These days many sites are offering snuba (snorkelling scuba) diving for amateurs. You use the same equipment as in scuba diving (fins, masks, weights, regulators) but instead of carrying the air tank on your back, you breathe from a long hose from tanks fixed on surface pontoon rafts. Professional dive guides accompany snuba diving groups. Ko Samui is another popular island known for its beaches (such as Chaweng, Lamai, Bophut, Bang Rak, etc) and diving points. From here, you can visit Mango Bay, located in Koh Tao, surrounded by small beaches, turquoise water and coral reefs. This bay is often used for scuba diving on a beginner level due to its flat and sandy seafloor. The best travel mode to get there is by boat. The Krabi Province is also known for its varied natural attractions, including caves and waterfalls, besides beaches and coral reefs. One of the most striking features here are the massive limestone karsts, rising high on land and water. The crystal clear water off Krabi beaches offer excellent diving opportunities. Located about 40km from Krabi (and Phuket), are the picturesque Phi Phi Islands, where the Hollywood film, The Beach featuring Leonardo Di Caprio was shot. Also nearby is the spectacular Lanta Island.