The Ma Shi Chau Special Area comprises four islands in Tolo Harbor. It's a geologically interesting area, and there are plenty of interpretative signposts to help you understand what you're looking at, perhaps a wave-cut platforms, tombolo (a sand bank linking two islands) or even fool's gold. And if rocks don't do it for you, look out for fossils, coral, and assorted marine life.
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Starts at Sam Mun Tsai fishing village at the top of Yim Tin Tsai Island, crosses to Ma Shi Chau island