[en] The GRANDE experiment is a unique ''next-generation'' detector capable of making significant contributions to the fields of ν and γ-ray astrophysics as well as performing important ''conventional'' high-energy physics investigations. The detector, which covers an area of 250 m /times/ 250 m, is based on the well proven water Cerenkov technique. It will have excellent coverage for potential sources of ν emission in the southern hemisphere and of VHE and UHE sources in the northern hemisphere. For VHE and UHE showers, the low threshold (≤10 TeV) and complete coverage for all three shower components (electromagnetic, muonic, and hadronic), are unique. Excellent angular resolution, <1/degree/ for ν's and <0.3/degree/ for γ-rays, large acceptance, good energy resolution, and wide energy sensitivity will permit detailed studies of the observed signals enabling a quantitative confrontation with theoretical predictions. The detector and some of its physics capabilities will be described. 4 refs., 7 figs