  We present HST/WFPC2 images in Halpha+[NII]6548,6583 lines and continuum
radiation and a VLA map at 8 GHz of the H2O gigamaser galaxy TXS2226-184. This
galaxy has the most luminous H2O maser emission known to date. Our red
continuum images reveal a highly elongated galaxy with a dust lane crossing the
nucleus. The surface brightness profile is best fitted by a bulge plus
exponential disk model, favoring classification as a highly inclined spiral
galaxy (i=70 degree). The color map confirms the dust lane aligned with the
galaxy major axis and crossing the putative nucleus. The Halpha+[NII] map
exhibits a gaseous, jet-like structure perpendicular to the nuclear dust lane
and the galaxy major axis. The radio map shows compact, steep spectrum emission
which is elongated in the same direction as the Halpha+[NII] emission. By
analogy with Seyfert galaxies, we therefore suspect this alignment reflects an
interaction between the radio jet and the ISM. The axes of the nuclear dust
disk, the radio emission, and the optical line emission apparently define the
axis of the AGN. The observations suggest that in this galaxy the nuclear
accretion disk, obscuring torus, and large scale molecular gas layer are
roughly coplanar. Our classification of the host galaxy strengthens the trend
for megamasers to be found preferentially in highly inclined spiral galaxies.
