We report scanning tunneling spectroscopy imagine of the vortex lattice in single crystalline MgB2. By tunneling parallel to the c-axis, a single superconducting gap (△=2.2 meV) associated with the π-band is observed. The vortices in the π-band have a large core size compared to estimates based on Hc2 , and show an absence of localized states in the core. Furthermore, superconductivity between, the vortices is rapidly suppressed by an applied field. These result suggest that superconductivity in the π-band is, at least partially, induced by the intrinsically superconducting ∂-bind.