It's also possible to get a closer look at the Chinese labourers' work on foot. Near the Tahoe National Forest, along Donner Pass Road, a plaque calls attention to the "China Wall", a 75ft retaining wall that still firmly holds the dirt above it in place today so that landslides didn't bury the track. Called an "engineering marvel" by the Truckee-Donner Historical Society, which installed the plaque, the wall was constructed by Chinese "master builders" who made it by stacking stones, one on top of the other, without any cement or mortar.
