I was literally waiting for this post!
In sum, even in a 50 meter stretch of dirt along a very active street, next to an airport, Geneva revealed a wide ranges of fungal life.
I think there are very few people who can find mushrooms and lichens next to an airport!
You might be right about the more conventional fungi, that took some searching.
But the only people who can't find lichen on the trees by the Geneva airport either aren't or literally blind. :D
I'm pretty sure it's usually the former :).
Rectification: find AND catalogue ;-D
I am definitely part of the group of people... who can't because they don't pay attention :D