File:Pen in water.jpgDescriptionPen in water.jpg English: A pen partially submerged in a bowl of water appears bent due to refraction at the water surface. Date 17 October
File:Water lift pump at Pen Parc.jpgthis work, hereby publish it under the following license: English Water lift pump at Pen Parc, Bryn Crug Wikimedia username: Peter Broster author name string: