I visited a cafeteria and store at a venue along Hadrian's Wall. Let us for the moment overlook that they had a gravel path leading to their disabled toilet facility, which then had a
step on the door and look at this win for service dogs with a yen for an adrenaline rush.
This large slide is the only edifice for miles around:

And if we zoom in to have a closer look at the sign:

We see that the slide sadly only accepts canines if they are qualified guide dogs. So if you have a guide dog who has always longed for a go on a seven foot slide, set compass for Hexham.