In the latest housing boom, there were unfinished houses and housing developments left to decay during the bust. But malinvestments mean too much of some things have been produced to satisfy demand for them and too little of other things to satisfy demand for them. For example, there would be new logging roads left unused, lumber mills with excess capacity, empty office space, and so on. The evidence is revealed in the liquidation process of the bust.
There are entire uninhabited cities in China.