Yes, China. Grandmaster Sin Kwan Thè has gone there on trips with students. So has foxbat(*) from FICS, he has made several trips over. Trouble is that neither has ever invited me to go with them. :'( I would love to see the Great Wall. Growing up, one of my favorite missionary biography subjects was J. Hudson Taylor. Since college days, I have very often turned to the writings of Watchman Nee for inspiration, alongside my Vance Havner and Tozer. I would so love to see China.
And of course the Holy Land would be great. I think for now I would like to take one of those packaged tours with someone like Erwin Lutzer or David Jeramiah, or one of those. I have a preacher friend who went a few years back and it dramatically affected his view of several passages, in the gospels especially, to get a view of the actual places for many of the events. Almost as much, I would like to visit some of the sites enshrined by more current events like the port of Haifa and Tel Aviv and some of the battlegrounds for the Israeli War of Independence. I have really enjoyed the Brock & Bodie Thoene books, they seem to make a lot of the history come alive, and an actual view of some of the settings for a mental backdrop would likely make it more so.