Segovia: At first the Disappearing Wall looks solid...
© Celia De Coca
...then the first visitors start pulling blocks out of the wall...
© Celia de Coca
...and discover the inscribed quotes...
© Celia De Coca
...more and more people come and browse through the quotes - at a distance...
© Celia de Coca
... until you can see the people on the other side of the wall
© Celia de Coca
