The little johny and his dog seem to be confused by the endless path shown in the illusion

The little johny and his dog seem to be confused by the endless path shown in the illusion

The water appears to fall down into the fountainbasin
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See the illusion carefully and tell whether these are really joined or it is just an Illusion?

How manu legs does this elephant have ?
Are the red lines perfectly straight?
Which man is the tallest in the picture below?
Look closer. All three are exactly the same size.