  We here combine Sunyaev-Zel'dovich effect, X-ray observations and
spectroscopic redshifts of member galaxies, to constrain the intrinsic
three-dimensional shape of the galaxy cluster: Abell 370. The cluster turns out
to be strongly elongated along the l.o.s., with two (or more) substructures in
the process of merging. Spectroscopy further suggests that the process must be
taking place at a small angle respect to the l.o.s.
