The Azure Window: its story underwater 

The iconic Azure Window in Dwejra, Gozo (Maltese Islands) collapsed in March 2017. This documentary describes a survey of the underwater remains of the arch. Photogrammetry was employed to create a 3D model of the entire site, enabling a better understanding and a reconstruction of the collapse event.
For more information, visit the Dwejra Portal: www.dwejra.net