The yanks built the Hoover Dam in the 1930s and then did it "again" in the 1960s in the middle of nowhere (well, actually in the Glen Canyon in the middle of nowhere) to create Lake Powell. This supplies water and electricity to the northern states in the south-west USA (if that makes sense) while the Hoover Dam does the same for the southern states. The round visitors' centre at the dam showed films and various exhibits that explained how the dam was built - which fascinated me because an engineer I never will be - and Laurel found an ancient friend too, what's left of him anyway (see left in case you are thinking I meant another of the geriatrics on the tour with us).
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