Unfortunately, the front lawn was under construction, which blocks the full view. Additionally, the gate & doors were not open for regular viewing, but I walked around the exterior to the best of my ability. It is my understanding there is Mass being held on Sunday mornings at 7:00 AM and Sunday evenings at 18:00, but I did not confirm as only learned after my visit. The exterior is rather grand and the grotto can be seen from the fence. The "gift shop" was open. It's worth standing in its presence. There is a tourist information booth to the right of the cathedral when walking down the lane to the front of the gate. The brochure is worth taking and was given to me in English. Easily accessible from Metro, walking, or Didi. Worth your time, if nothing else for a few moments of reflection - regardless of your religious beliefs.