In 2134, after NASA reached Mars and started regular tourist transport they made a whole lot of money and decided to open a space themed amusement park on Mars. After all, there is not much to do up there. Of course there is no breathable air, so visitors must stay inside the buildings and they have to wear special oxygen masks while riding the coaster. The park itself is not too big, because it's complicated to get materials and to build such building in this environment. Have fun!