There is one place named Porphyry Mountain in Canada.
All places in the world called "Porphyry Mountain".
Wellington (4)
Windsor (4)
Westport (3)
Milton (3)
Richmond (3)
Benton (3)
Saint Andrews (3)
Selkirk (3)
Tracadie (3)
Kingston (3)
Victoria (3)
Havelock (3)
Sidney (3)
Centreville (3)
Princeton (3)
Borden (3)
Cornwall (2)
Enterprise (2)
Hebron (2)
Lockeport (2)
Newcastle (2)
Roblin (2)
Sandy Lake (2)
Sydney (2)
Beaver (2)
Cambridge (2)
Charlottetown (2)
Delta (2)
Georgetown (2)
Kildonan (2)