My all time favorite unaccompanied traveller is my great grandmother, who emigrated to America with the address of family living in Chicago in her pocket. Being a young lass from the Irish hinterlands, she had no clue how to get there from NYC, and asked a passing Irishman how to do it. He called her a cab, and when the cabbie arrived asked for his license.
"Now James, this is how it is going to be. Young Miss May is going to visit her family, the Henries, out in Chicago. Here is money for the trip. After she gets there, she is going to write me a letter praising your character as a gentleman. If I do not receive that letter, James, I swear by all the saints that you are a dead man."
Obviously, since I am here to tell the tale, James was completed his task with dispatch.
http://www.japanprobe.com/2010/07/29/japanese-kid-takes-solo...