To the south of Water Sinks is Watlowes Dry Valley. As the name suggests water no longer flows down here (due to Water Sinks). It was formed when water flowed to, and over, Malham Cove. During the last ice age water could not penetrate the frozen ground therefore it eroded the v-shaped valley. After the ice age water was able to permeate the joints and bedding planes leaving the dry valley.