The Invisible Pavilion is a site specific Augmented Reality layer for the Reality Browser Layar. You need a iPhone 3GS+, practitioner
Android or Symbian smartphone with the Layar app installed to view the Pavilion.
You can download the Layar App here: http://www.layar.com (or just in your Android Market, or App Store)
You can lauch the Invisible Pavilion here: http://www.layar.com/layers/theinvisiblepavilion