But the most talked-about piece is the Cloaca Professional, labeled the “poo-machine.” It was built by Belgian artist Wim Delvoye to mimic the actions of the human digestive system.

A series of glass receptacles hang in a row with the machine being “fed” twice a day on one end. The food is ground up “naturally,” the way it is in the human body, and the device produces feces on the clock at 2 p.m. at the other end.

The smell is so powerful that not many visitors can take it.