I have an overnight layover in Beijing at the end of January and was planning on getting a room near the airport and trying to see something before I have to go back to catch my connecting flight. How far is the Badaling Wall from the airport? Would it be possible to get a tour just to see this section of the wall? How early do the tours leave? I would like to leave as early as possible in the morning. Would definitely need an English speaking tour guide. Any help would be greatly appreciated! Thank you!