From a distance, these columns appear to be vanishing. It's a clever optical effect by Korean artist Seon Ghi Bahk. He made them by suspending pieces of charcoal at precise lengths on nylon threads. He calls the installation Fiction of the Fabricated Image. It's on display at the Zardok Gallery in Miami.
Bakh used charcoal because it is an organic material. It's made from wood, so these columns are the ghosts of trees. By his choice of material, Bakh expresses that human civilization is built upon the natural world.