50,000 Milk Cartons Make a Great Castle

Built back in May, during an event that took place in Granada, Spain, this recycled castle was made of 50,000 empty milk cartons.

Designed by the students of the Facultad de Arquitectura de Granada (Granada's Architectural College), the milk carton castle of Granada was built exclusively out of  tens of thousands of empty milk cartons, gathered by over 5,000 primary school children. The three schools that gathered the most number of milk cartons had the privilege to attend the unveiling ceremony and see the end result of their efforts.

The 29-meters-long, 14.07-meter wide and 7-meter-high milk carton castle was acknowledged by the Guinness Book of Records as the biggest sculpture ever made with recycled materials.