Hong Kong Museum of the War of Resistance and Coastal Defence
The Lei Yue Mun Fort makes for an appropriate home for this museum that focuses on Hong Kong's military history and coastal defense. It's in the redoubt, a high area of land overlooking the narrowest point of the harbor; you take an elevator and cross an aerial walkway to reach it. As well as the fascinating displays indoors, there's a historical trail complete with tunnels, cannons, and observation posts. Free guided tours are available on Wednesday, weekends, and public holidays.