The skyline of Toronto, Canada, is visible from across Lake Ontario, including from the cities of Hamilton and Niagara-on-the-Lake, as well as the Fort Niagara National Park. However, only its upper part is clearly visible, consistent with the spherical Earth model.
The upper parts of the skyline are affected less by atmospheric refraction, and more clearly visible. And the nearer to the horizon, the higher is the effect of atmospheric refraction. There are a few brighter colored buildings that appear above where they should be. These are the phenomenon of looming if they look upright, or superior mirage if they are upside down.
Flat-Earthers like to focus themselves on the visibility of the brightly colored Rogers Center on the left side of the CN Tower and ignore the rest of the buildings. From its upside-down shape, it is clearly a superior mirage. Atmospheric refraction causes the rays of light coming from the Rogers Center to reach the observer. However, these rays of light become irregular as they reach the observer and no longer resemble the actual shape of the Rogers Center.
References
- Views of Toronto from Hamilton and Fort Niagara Illustrate Earth’s Curvature – Mick West, Metabunk
- Looming, Towering, Stooping, and Sinking – Andrew T. Young