I am interested in any suggestions for an overnight layover. Parents and two teens. Arrive 7:00 pm (from SYD) and leave 11:00 am (to US). We can sleep on the planes (though we will get a hotel room). We would be up for seeing the city at night, to as late as 2 am or so, or very early, say 5 am. Any suggestions for self-tour or perhaps a guide who would accompany us on those odd hours? Any chance of visiting DMZ early enough to get back for the 11 am flight?