Cloud City: My Favorite Game Mechanism

About Cloud City, from BoardGameGeek:

In Cloud City, you compete against other architects to create the best city planning project to be chosen by the city council. Have your project chosen and built for the people of Cloud City to enjoy! Develop your city with buildings and build walkways to connect buildings to one another. Walkways earn city council votes and the longer the walkway, the more points. Walkways can earn 1, 2, 3, 5, or 8 city council votes. River walkways connect the smallest buildings, forest walkways connect midsize buildings, and ice walkways connect the tallest buildings. The architect with the city plan that features the most and the longest walkways will win the game! -description from the publisher