The sacristy of the main church is huge. I've never been in there. The day after returning from tertianship I celebrated Mass in the Crypt Church on the lower level, where the sacristy is only slightly smaller. Will save photos of the crypt for a later entry.
Every one of the chapels in the Shrine is dedicated to Our Lady. The following three arethe Byzantine-Ruthenian Chapel, Our Lady of Lebanon, and Our Lady of La Vang, constructed in memory of the Vietnamese Martyrs.