Seriously? Not sure about you but where I live (at least 20 miles radius) everything have been explored and overexplored. The main reason I do the run is to stay healthy and also makes me feel good. That said, I don't do the same route twice in a row but surely I do same route twice (maybe after few days). It's like eating the same dish everyday or doing same exersice on the gym veryday. I have several routes and I keep switching between them.
I live in the Dallas area and there are places to run abound. Parks and preserves every few miles. What I meant about exploring is my own personal exploring. One can even find enjoyment running through the concrete jungle as long as it's fresh. I just can't run the same route repeatedly, no matter the scenery. You can only look at the same tree so many times.