There is one place named Slippery Rock Lake in Canada.
All places in the world called "Slippery Rock Lake".
Wellington (4)
Windsor (4)
Saint Andrews (3)
Selkirk (3)
Tracadie (3)
Kingston (3)
Victoria (3)
Havelock (3)
Centreville (3)
Sidney (3)
Borden (3)
Princeton (3)
Westport (3)
Milton (3)
Richmond (3)
Benton (3)
Aylmer (2)
Burlington (2)
Clinton (2)
Echo Bay (2)
Greenwood (2)
La Salle (2)
Mount Pleasant (2)
Red Rock (2)
Saint Paul (2)
Stony (2)
Waugh (2)
Bellevue (2)
Caribou (2)
Cumberland (2)