Freedom, Abu Simbel was one of the many monuments moved in the 50's when the waters started to rise after the building of the new dam at Aswan. Basically the water in Lake Nasser now covers the virtually the whole of what was Nubia, from Aswan down to the border with Sudan. The United Nations stepped in to co-ordinate a rescue operation for many temples which were threatened. Is that what you are thinking of? I certainly haven't heard that anything is currently under threat from rising water.