Pedestrian wayfinding signage in Thessaloniki is adding information of the calorie burning value of walking

That's pretty creative.  And something that should be done for every center city wayfinding system.

A number of years ago, I wrote an article on culture-based revitalization in Thessaloniki for the Europe in Baltimore program sponsored by the EU National Institutes of Culture Washington Chapter.

-- "Thessaloniki: Regeneration as an ongoing process"

And in the Bangkok Metro system, they have painted similar information on stairway risers.

Again, a good idea that needs to be implemented in more public places as a way to promote healthy mobility behaviors.