The Cataraqui River forms the lower portion of the Rideau Canal. The Cataraqui River system was extensively modified during the construction of the canal: swamps were turned into lakes and new marshes were formed. The Cataraqui River drains into Lake Ontario near Kingston, Ontario.
... are these stations, all of which were at the far end of the Metropolitan Line, and stretch the definition of "tube station" a little:
Waddesdon tube ...