Hi! I am arriving at the Madrid airport terminal 4S at 9:55 am and departing for Venice at 16:10pm from the same terminal. I woud appreciate your advice in deciding if I should go to visit the city. primarily Palace Real or not? If so what would be the best way to get there? Should I worry about clearing security and are there long lines? This is my first time to travel this route and would love to take advantage of the few hours I have in Madrid. Thanks in advance for your input!!!