There are two categories of travel inspiration: one is narrative, the other practical.
Classifying travel guides as a simple subpart of fiction inspiration is a category mistake.
Narrative inspiration (films, books) creates an emotional desire, while practical inspiration (guides) provides concrete information; they are different types of impulses.
A guide on Germany's national parks can be the primary source of inspiration, showing itineraries and practical information, without any fiction being involved beforehand.