Playdom has been promoting its newest game, City of Wonder, most noticeably in Social City. So it's no surprise that City of Wonder has been on a remarkable uphill climb this week, where it's likely to hit the one million mark for Monthly Active Users. Market Street has already surpassed that count, and had also enjoyed a similar promotional effort on the part of Playdom.
Players who get to Level 5 in City of Wonder will get a free Ancient Colosseum. This massive structure takes up a 9x9 space on your city grid and brings in +7,500 Happiness Points, which is identical to the stats for the Market Street Shopping District.