There are parks at at least two of Canada’s extremities: Point Pelee (the southernmost point on the mainland) and Cape Spear (the easternmost point). There are signs on both pointing this out.
The absolute southernmost point is Middle Island, which is an uninhabited nature reserve.
The Westernmost point is Boundary Peak 187 in the Yukon. It is not part of a park, and is marked only by a surveyors marker.
The northernmost point is far into the arctic. I’m pretty sure there is no sign.
Credit:stackoverflow.com‘