Alexander Calder’s Saurien forces people to interact with the sculpture by walking around it in order to get inside the IBM building. At a towering eighteen feet tall, its spikes resemble a gigantic metal lizard. If you think Saurien resembles a lizard, you would be right: “saurien” is French for “lizard.” Although Alexander Calder is better known for his mobile sculptures, he also created static sculptures, which he called “stabile.” The sculpture is part of the building’s art collection, which also includes work by Robert Indiana and Andy Warhol.