[Christo and Jeanne-Claude, the umbrellas, Japan-USA, 1984-91]
[Agnes Denes, Wheatfield - A Confrontation, Manhattan, New York, 1982]
[RO&AD Architecten, Moses Bridge, Halsteren, Netherlands, 2011]
[Olafur Eliasson, waterfalls, New York, 2008]
