Translation of comma in German

We drove to the airport to do early check-in but it went so quickly that we had four hours left before our flight departed. We therefore took a cab back into town and visited the local market.
Anyway, back on the boat station we tipped the father and left. The bus was already waiting although we were the first ones to arrive. We had to wait nearly one hour until everybody was back.
In Colorado there are amazing mountains, belonging to the Rocky Mountains and in New Mexico you have the really gorgeous desert areas. Some other states there have also large desert areas.