In April, Steve Wynn announced plans to tear up the golf course that lies behind two of his Las Vegas hotels and replace it with a 38-acre man-made lake, about the size of 30 American football fields. Rising from the middle of the lagoon, Wynn said during a conference call last week, will be a 10-story mountain, accessible by zip line and electric ferry, that will serve as a launching point for nightly fireworks.

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