Woke this morning feeling really rough and decided that it would be a good idea to get some fresh air and exercise. Our guide yesterday had told us we could go around the city wall and it would take 1 1/2 hours so this seemed like a good plan. Set off on this walk and after an hour we had not even walked one side of the wall so we stopped to ask someone how far it was to be told it was 14 km and that it takes 1 1/2 hours on a bike not walking and of course there were no bikes!! Continued walking for another 1 1/2 hours and then went to try and buy some train tickets to go south which was not as straight forward as we hoped. Ended up going back to the hostel with no train tickets and still feeling rough (not the best day!) Although I have now arranged for the hostel to buy our train tickets for us.