Now all I need to do is find out what 'Calder' means
Australia
Calder River (Tasmania), a tributary of Inglis River
Calder River (Victoria)
Calder River (Western Australia) in the Kimberley region

United Kingdom
River Calder, West Yorkshire, a major tributary of the River Aire
River Calder, Cumbria, flows into the Irish Sea near Sellafield
River Calder, Lancashire, a major tributary of the River Ribble
River Calder, Wyre, Lancashire, a tributary of the River Wyre
River Calder, Highland, a tributary of the River Spey
River Calder, Renfrewshire near Lochwinnoch
Tributaries of the River Clyde: Rotten Calder, near East Kilbride
North Calder Water, from the Black Loch to Daldowie
South Calder Water, near Wishaw
Calder Water, near Strathaven, a tributary of the Avon Water