We took this tour last April and were dropped off and picked up at Neptuno which had several bus stops (see circled area on the left of the map). After we were dropped off (people not going to the Alcazar-we had been there on our previous trip so wanted to go to the Royal Chapel and Cathedral), they dropped the people with Alcazar tickets off closer to the entrance but not sure where. I do know that some people with early admission missed their times because the “toilet stop” on the way was very long (driver was eating breakfast). I had taken a tour to the Alcazar with Spain Day Tours previously which worked well.