Xiǎngshuǐhú means ‘loud water lake’, which may suggest tempting visions of the Great Wall reflected in turbulent waters. The name actually derives from a nearby spring and the surrounding area can be quite dry, especially in winter and spring. Nonetheless, the restored Ming-era wall here has some staggeringly steep gradients, which make for quite a Great Wall StairMaster workout. Sections of the fortification, which divides into two at the road, come with 1m-high steps that make you feel totally Lilliputian. Take shoes with good grip. Located to the west of Mùtiányù and about 30km from Huáiróu.