it's not Pilztal, but Pitztal, and it is a nice valley in the silicat-alps
of Austria. Here you can find good populations of P. leptoceras and if
you are happy, you can find sometimes 'alba'-forms, plants with white
flowers, but these are quite rare (I've seen 3 plants of it). Besides
that, you can find here also P. vulgaris, D. anglica and Utric's., so,
worth to visit :-).
Cheers
Joe