every year. Permits are available from calderglen visitor centre and the post office at the town centre The river flows via the north side of Blantyre and forms the eastern boundary of the Newton district of Cambuslang before joining the River Clyde opposite Daldowie. The valley of the Rotten Calder includes hermitages, islets, caves, crannies, ancient markings, fountains, fairy wells, numerous waterfalls, over 200 nature trails, summerhouses, ruined castles, and steep cliffs. In addition to Calderglen Park and Calderwood House, the river is referenced in other man-made features near its course, including the Calderwood residential area of East Kilbride, Calderglen High School in the same town, Calderglen House and the former Caldervale village near Blantyre, and Calderside Academy in the same town. See also North Calder Water, flows through North Lanarkshire to the Clyde from near Caldercruix to Daldowie, its mouth on the north bank almost opposite that of the Rotten Calder on the south bank South Calder Water, also flows through North Lanarkshire to the Clyde from near Shotts to Strathclyde Park References Maxwellton and Calderwood Estate, c. 1969–1977, Fred Mitchell Manuscript External links Rivers of South Lanarkshire River Clyde Cambuslang East Kilbride Blantyre, South Lanarkshire