[asenk]

By looking at the river you can notice a moiré pattern with lines both horizontal and vertical to the camera, although the vertical lines are more apparent. I figure these would be either artifacts from the stitching process, or limitations of the lens itself. The effect also correlates in size and shape with out of focus areas, which can likewise be found in the river, signaling that it is indeed an artifact caused by the panorama.

I guess you can take this as an exercise for the future when you can't quite figure out whether you are stuck in a virtual reality or not.

[bayindirh]

When you clear the cache or visit the site for the first time and zoom in, you can see the tiles load. These lines are at the stiching borders, and coming from the stiching algorithm.

Lens/sensor limit moire looks very different when compared to this.