His project, Tread Lightly: A Linear Festival Along the Transcaucasian Trail, is a plan for structures in the dramatic landscape along a trail in the mountains that extend from Armenia to Jordan. The delicate models sit on cylinder pedestals in the long galleries of the Arsenale. Gumuchdjian’s vision of what could be built there is as much about the landscape as it is about his designs, with lakes, gorges and thick vegetation. Are they fantasies? The more the magical landscape becomes known, the more likely they are to be built, he says.