  Multi-wavelength techniques can probe the distribution and the physical
properties of baryons and dark matter in galaxy clusters from the inner regions
out to the peripheries. We present a full three-dimensional analysis combining
strong and weak lensing, X-ray surface brightness and temperature, and the
Sunyaev-Zel'dovich effect. The method is applied to MACS J1206.2-0847, a
remarkably regular, face-on, massive, M_{200}=(1.1+-0.2)*10^{15}M_Sun/h,
cluster at z=0.44. The measured concentration, c_{200}=6.3+-1.2, and the
triaxial shape are common to halos formed in a LCDM scenario. The gas has
settled in and follows the shape of the gravitational potential, which is
evidence of pressure equilibrium via the shape theorem. There is no evidence
for significant non-thermal pressure and the equilibrium is hydrostatic.
