Fisheye view.

Describes the author's family vacations in the mountains of the Lleyn Peninsula in Wales. Her memories of seeing a lake created with the Trawsfynydd Dam, and her father's tales of houses submerged underneath it; The environmental effects of dam-building; Struggles of fish to survive in artificial lakes, and their thriving when the rivers are returned to their natural course; How many dams in the United States are economically and physically defunct.