How to build CityVille's Leaning Tower Landmark with your friends

Alright, we'll even admit that the Landmarks in CityVille are a tad on the useless silly side. Regardless, Zynga has released yet another of these real life landmark-inspired Population boosts to the game: the Leaning Tower. The new building goes for an immense 300 thousand coins and will raise your city's Population cap by 1,250. Not to mention you'll need some help from your friends to build this massive structure.