If you’ve ever played Monopoly then you know that snatching up all the properties of the same color gains you a monopoly. It’s nice to collect rent on a square that gets landed on frequently, but if you land on Illinois Avenue repeatedly, at $20 each time, that might not cause you to win or lose the game. A surefire way to speed up the progression of the game is to build up houses and hotels on these properties. You can only build on a property if you have a monopoly (aka, the entire color set). The set of orange properties ranks No. 1 and the set of red properties ranks No. 2 in frequency. This list only includes properties where rent is charged; spaces like Go, Jail, and Free Parking are not included. There are 28 property squares that qualify for this list. In case you are wondering, Boardwalk ranks 16th.