Recently, we investigated dynamics of water in beryl, the structure of which contains 5 A diameter channels along the c-axis. INS spectra revealed that effective potential for water along the channels was significantly steeper than perpendicular. The observed 7 peaks (E=0.25 to 15meV) at T=1.5K were explained assuming water quantum rotation-translation tunneling across the channels. DINS study of beryl at T=4.3K showed narrow, anisotropic water proton momentum distribution with corresponding kinetic energy, Ek=95meV, which is much less than was previously observed in bulk water (~150 meV). We believe that the exceptionally small Ek in beryl is a result of water tunneling. In this proposal we would like to do DINS for beryl at T=45 and 260 K, where water does not tunnel anymore (should be more ¿classical¿), and for this we need 8 days at VESUVIO.