 Inland , many of the attractions are small towns and villages or linked to the river valleys , such as the ancient clapper bridge at Tarr Steps and the Snowdrop Valley near Wheddon Cross , which is carpeted in snowdrops in February and , later , displays bluebells . Withypool is also in the Barle Valley , the Two Moors Way passes through the village . As well as Dunster Castle , Dunster 's other attractions include a priory , dovecote , yarn market , inn , packhorse bridge , mill and a stop on the West Somerset Railway . Exford lies on the River Exe . 
