What about ATB's?
Here's some pictures of random multi day adventures on my all terrain bike. More details of these trips can be found in the travelogue section of this site.
The Ascent to Vrîsic pass Northern Slovenia.
Looking at the descent from 1400m, from the col on Mount Stol Slovenia, that's not a paved road!
In the middle of a nature reserve near Buckow in North Eastern Germany.
The infamous cobbled trails of Brandenburg.
The highest point of the Lüneburg Heide, the Wilseder Berg at a mighty 169 m high!
Traversing the forests of the Lüneburger Heide.
The barren heathland of the Lüneburger Heide.
Those Spanish trails in your photo's sure do look lovely though, maybe one day i'll make it down there.