By 2021 at Las Vegas (hopefully) will be opened a large tourist attraction complex called "Mars World" worth of 2 billion $. The authors of the ambitious project has stated that the attraction will include "worlds largest dome" and "visitors will be treated to the music, costumes and culture of a Mars colony. They will take simulated "Marswalks" in one-fourth Earth gravity, ride a tram around the crater in which the city is built and even sleep overnight in rough habitats if they wish."
Here are some of the concept art pieces for the "Mars World" by Brian Cho: