Another question that only Trip Advisor can answer...
I have problems with one knee and so would prefer to keep to level ground for walking. This of course puts a crimp in my travel style, since I really enjoy walking in cities like Madrid. The 'only' way to see new places for me is from the ground.
What areas should I avoid? Gradual inclines are fine, hills are not. I'm ready to book a fabulous flat on Plaza de la Paja, but the Google Street Views give me concern.
Any suggestions would be greatly appreciated.