The Best Western The Watermill hotel is in Hemel Hempstead in Hertfordshire. The hotel is set in an old flour mill, and located on the banks of the River Bulbourne. Ample guest car parking and Internet access are provided for all guests. The hotel lies in the heart of the countryside in Hertfordshire, and offers a great base for walks along the Grand Union Canal, or exploration of all the other attractions of the region. The hotel boasts panoramic views out over the river, and a tranquil setting.