Can You See a Great Lake from the CN Tower? No—But You See Lake Ontario

The CN Tower in Toronto offers spectacular views—but you cannot see any of the Great Lakes from it.

Why? Toronto sits on the northwestern shore of Lake Ontario—which is one of the five Great Lakes. From the CN Tower's observation decks (346 m / 1,136 ft and 447 m / 1,465 ft), you can clearly see Lake Ontario stretching to the horizon.

The confusion arises because people often think of "the Great Lakes" as the upper four (Superior, Michigan, Huron, Erie)—but Lake Ontario is a Great Lake. The others are too far: Erie is ~150 km (90 mi) southwest (blocked by Niagara Escarpment and curvature); Huron/Superior/Michigan are hundreds of km away.

So: You see Lake Ontario (a Great Lake) from the CN Tower. You do not see the other four.