Impossible pictures !

Just some impossible pictures from my collection...

Endless stairs???

Swimming pool. To dive or climb???

Platform. Bottom or top???

Ok, ok, here is the well known fork...

The same figure, but now with more details...

What is wrong with this brick wall?

Elephant with four or five legs?

Were comes this hole in the triangle from???

One piece with shadow or two pieces?

Window or cube?

Click here to see the construction movie of this waterfall.
With spoken comments in English.

Click here to see how the Belvedere house has been constructed.
With English comments.

Click here to see the construction of an endless stairs.
Again, with spoken comments in English.