I visited Las Vegas for the first time this last week and my first impression was that it is a city that works very hard to keep you inside. Finding the exit to a casino is an adventure in itself. Walking along the "Strip" with its broken pavements, escort touts flapping hooker cards and caged-in walkways only encourages you to stay inside. And they spend a lot of money on making the inside attractive. Much of it is not to my taste, but the Chihuly light fixture in the Bellagio is quite wonderful.
Like an oyster, the pearl inside is more attractive than the shell, and like an oyster there is some risk in consuming it.