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enter image description here

EDIT

In case his comment is deleted, please take account of Samuuel Weir's remark in assessing my wording below:

I don't think that it's a matter of lens distortion. As I recall, it's an apparent distortion primarily due to the fact that the plane of the camera's sensor is tilted upward with respect to the horizon. There are so-called "perspective control" lenses which can correct for the distortion. See, for example: kenrockwell.com/nikon/19mm.htm . Also: en.wikipedia.org/wiki/Tilt–shift_photography (Sorry, it doesn't appear that the entire web address was converted into a hyperlink because of the hyphen. Just copy the whole address and paste it into the address line of your browser

END EDIT

No building authority would allow this degree of vertical tilt, so obviously the camera does sometimes lie.

This is an example of aberration, caused by distortions of light ray paths inside of the camera lens, particularly with zoom lenses.

This curvilinear aberration can take one of two forms, either like this:

enter image description here

Pincushion distortion:

Or like this:

enter image description here

Barrel distortion, which is what causes the effect in your picture.

These pictures are taken from Curvilinear Distortion.

PhotoSE deals with this, but on first reading anyway, not in as much detail as I would have expected.

I agree, if it was due to a previously unknown aspect of physics, that would be great. Sadly, it's more mundane.

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