Translation of zertifizieren

One of my favorite seasons is the winter, the time in which everything is white and bright. But even though I like this time of the year a part of me detests it because of it may drawbacks.
I almost forgot to tell you, that the water was brown, despite of its name... Anyway, as I was already close to my next destination I went and consulted with a tourguide of Austrian travelers.
About the accents: This is not a mistake, it is on purpose. Please note that in Spanish some words have accents when asked in a question (I.e que, porque, qui...). Pay attention to the question mark.