That’s Wieliczka salt mine, sounds more like a regular tourism and less like pilgrimage. At least it’s not Licheń, plastic-clad tourist trap monstrosity where you have unique opportunity to get scammed by our only televangelist (whose main medium is radio, and is catholic)
Częstochowa is on a hill, that’s a big centuries old monastery. Frequent pilgrimage target
look up all the weird shit polish immigrants are up to in Chicago. You’d think they’re living in 20s or at least 70s