[![enter image description here][1]][1]

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][2]][2]

Pincushion distortion:

Or like this:

[![enter image description here][3]][3]

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

These pictures are taken from [Curvilinear Distortion][4].

[PhotoSE][5] 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.


  [1]: https://i.sstatic.net/YxKQF.jpg
  [2]: https://i.sstatic.net/S9Wrn.jpg
  [3]: https://i.sstatic.net/t1p9B.jpg
  [4]: http://av.jpn.support.panasonic.com/support/global/cs/dsc/knowhow/knowhow15.html
  [5]: https://photo.stackexchange.com/questions/481/how-many-optical-aberration-types-are-there-in-lenses-and-what-are-they