Tour guides can actually elevate our experience when we travel. Because they give us insights and stories on places we visit in our travels.
I personally had much more interesting visits to a place when I joined a tour. Hence I felt more interested in learning more about it when I heard what the tour guide was saying.
Therefore we are learning about stories that you can not find in any guide book. These are the local legends that are known from mouth to mouth.
Yet there are not tour guides for every interest. So most of them are more into history and archaeology, because these are the most common courses they are taught in colleges.
Geologists as tour guides in geotourism
Geologists are becoming more and more often tour guides in geotourism. Hence they are providing an alternative service in touring.
Already many places in the world, like Iceland, USA or UK, are quite famous for their geological tours. But more and more countries are becoming geotourism destinations, such as Greece.