“Fountains have been shut off, canals drained, streets closed or harder to navigate,” Michael Green, a University of Nevada, Las Vegas history professor, said after six months of road work and temporary grandstand construction for some of the most monied spectators in sports. The famous fountains at the Bellagio won't be very visible this week amid the roar of Formula One racing on the Las Vegas Strip, and gondoliers won't be serenading tourists at the Venetian resort.