I wouldn't try that - DFW is a reasonably long way from Downtown Dallas - by DART it might take you an hour to get; in a cab also probably 45 minutes (maybe more with traffic) - the JFK Museum normally has a healthy queue, and the outdoor site itself is passably interesting but not much more than that...it really is still just a freeway.


Don't know about other options, but I wouldn't bother attempting Downtown Dallas. Maybe a visit to Cowboy Stadium / AT&T (or whatever it's called - the Dallas Cowboys home venue not the Cotton Bowl) - that's quite near DFW