Way overrated. It is very like visiting any limestone cavern. You might go if you've never been in a large cave before. Because, with the exception of a few second-rate bits of modern sculpture, that's all it is, really, a man-made cave. The only other attractions are the old wooden chapels built in the mines by miners, but they only show you two old ones, and the twentieth centruy big church.

As for that, go to India (Ajunta and others) if you want to see really spectacular ancient religious buildings carved into the living stone. Or to any of several monestaries in the Judean desert.

There are only two interesting bits of sculpture, two old figures kneeling in worship in an old oterwise wooden chapel. they are interestign because the old-time miners carved them and because, being salt, theyhave 'melted' or weathered.

Oh, it's not like it looks like salt. It's not white, not crystalline, doesn't glisten. It just looks like stone.

and lots of ther carved objects are disappointing. I had hears about the chandaliers carved at salk. they are wooden frames, with salt melted and formed into clear 'crystals' that are just lumps of clear salt. A few have crude faceting. Not like cut crystals at all.

big waste of time.