After we arrived to Dammam we directly took the night bus (SAPTCO) to Riyadh and met our friend there. We didn't really know how to get from A to B inside the city and realized that the only way is to take a taxi (or Uber) because the public transportation system is not really existent.br br However, we enjoyed some Yemeni food, got invited for coffee by a local and explored the old town of Riyadh.