Thank you all.
I saw all the impressive moc castle in the web and with my stubbornness I said to myself: "I want to build something like that too!". I took some measurement of a room and I decided the extent of the moc and than I began to project it.
Of course this is the result of many attempt and many changes at the early buildings, here some photos of the old attempt My Mocpages.
The transportation is the big problem of the moc but we succeeded in displaying it at two recent ITLUG event.
There are 8 pieces: the waterfall, the lake, the castle can be split in three big pieces (not counting the upper part of the towers which are removable like in the photos on brickshelf), than three pieces for the islands (two for the right one and one for the left).
If you're interested I can make a photo of the separated pieces.