Chedi Phra That Sila Ngu

The red chapel is what does it. Set against a golden stupa and the sea right there behind it, the color combination looks nothing like the temples you'll see elsewhere on Samui, and the snake motif runs through the whole place. Locals call it Snake Stone Temple after the rock patterns down by the shore. It's small. You could walk it in five minutes and feel a bit underwhelmed. Give it fifteen, look properly at the murals and the sculpture detail on the chapel, and it turns into something else entirely.

What I like about it is how few people bother. This isn't on the coach circuit, so most days you'll have the grounds to yourself or share them with locals. Some days there's a local event on and the mood shifts, which is worth catching if you land on one. Pair it with other stops on this side of the island rather than driving out for it alone.