Why go
The island was once far more isolated from mainland Thailand, and roads through its difficult interior came late. Tourism then reshaped the coastal settlements, particularly around Chaweng and Lamai. Reading the island through that contrast helps you plan beyond a single resort beach and understand why the inland landscape feels separate from the developed shore.
The full story
Ko Samui's coast and center developed at different speeds. Coconut and fruit cultivation occupied the lower ground, while a wooded, mountainous interior made journeys across the island difficult. Before roads were built in the early 1970s, a trip between opposite sides could take much of a day on foot. The first small scale visitor accommodation followed, then larger tourism development changed the shoreline. Today Chaweng and Lamai show the strongest beach town growth, while the hills remain a useful reminder of the island's older physical barriers. Nathon, on the northwest coast, retains its port role and a different feel from the northeast beach areas. A visitor can use this contrast to choose a base: stay close to the beach activity you want most, then set aside separate time for inland sights or another coast rather than assuming everything nearby on a map is quick to reach.