  Here we report on observations of the three-dimensional structure of a
sunspot magnetic field from the photosphere to the chromosphere, obtained with
the new visible/infrared spectro-polarimeter SPINOR. The observations,
interpreted with a non-LTE modeling technique, reveal a surprisingly complex
topology with areas of opposite-sign torsion, suggesting that flux-ropes of
opposite helicities may coexist together in the same spot.
