Ythan Wells, also known as Glenmailen, is the site of a Roman military camp, near the farm of Glenmellan, east of the village of Ythanwells in Aberdeenshire, Scotland. Traces of two marching camps have been found at the site. The larger camp, covering some was discovered in 1785 by Col. Alex Shand. A smaller camp, extending to and partially overlapping the area of the first, was discovered by J. K. St Joseph in 1968. This smaller camp predates the larger and has been dated to the campaigns of Agricola.