Hollow ways, or sunken roads, are trenches in the ground, made from people and animals walking the same path over many years. Their feet have literally worn down the ground and formed a long furrow in the terrain. Maybe the prehistoric people at Guslund have walked back and forth to the big burial cairns at the top of the hill? Hollow ways are often easier to see in inclining terrain. At Guslund, there are several sunken roads.