An octahedron
Detail of a flying structure, by the artist José María Yturralde, with title "Octaedro", 1976.
You can see another photo of the same work, where one sees more clearly how the structure recalls that of an octahedron; or another flying structure by the same author.
© José María Yturralde
foto di José María Yturralde
The image belongs to the sections...:
Octahedron (3D geometry)
Polyhedra around the world (3D geometry)
Sculptures (Anthology of images)
Further information:
http://www.yturralde.org/index-es.html