An ice cap is a huge amount of ice that covers land.
"Vatnajökull". Licensed under Public Domain via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Vatnaj%C3%B6kull.jpeg#/media/File:Vatnaj%C3%B6kull.jpeg
This ice cap is in Vatnajokuli, Iceland. The photo was taken from a plane.