The Infinity of Knowledge. The Prague Municipal Library at Marianske Square, Prague, Czech Republic is definitely worth visiting because of an amazing sculpture made of numerous books by Matej Kren, a young Czechoslovak artist.
Leonardo da Vinci´s " never-built" horse - made by Nina Akamu from Da Vinci's original drawings. It is not exactly the same as Da Vinci's horse would have been. Installed in Milan in 500 years after the original clay model was destroyed.