When being in Aserbaijan capital Baku I saw red sightseeing buses. One morning I waited at a stop, start point near Baku Hilton Hotel. The ticket cost 10 manat (about 10 pounds or 10 euros or 10 dollar, they all are almost the same). The ticket was valid for 24 hours. The schedule and route were very good. It was possible to go out to see sughtseeings closer and hop on the next bus later. I used the ticket during two days to see the town. It helped me much to get overview. There is much to see in Baku, both in old town (Unesco Heritage) and near newer buildings. I suggest Baku to people who have not been there!