  Astrophysical implications of gravitational microlensing of gravitational
waves emitted by rotating neutron stars (NSs) are investigated. In particular,
attention is focused on the following situations: i) NSs in the galactic bulge
lensed by a central black hole of $2.6\times 10^6 M_{\odot}$ or by stars and
MACHOs distributed in the galactic bulge, disk and halo between Earth and the
sources; ii) NSs in globular clusters lensed by a central black hole of $\sim
10^3 M_{\odot}$ or by stars and MACHOs distributed throughout the Galaxy. The
detection of such kind of microlensing events will give a unique opportunity
for the unambiguous mapping of the central region of the Galaxy and of globular
clusters. In addition, the detection of such events will provide a new test of
the General Theory of Relativity. Gravitational microlensing will, moreover,
increase the challenge of detecting gravitational waves from NSs.
