In 2014, I was on an "adventure" tour of Madagascar. One of the tour members was an 18-year-old from Australia. It was her first trip overseas. She celebrated her 19th birthday on the tour. After Madagascar, she was booked on another "adventure" tour from Nairobi to Cape Town. So there are viable options besides Europe. Some of these tours are good value; and a good introduction to travel.
[ Edit: Edited on 04-Jan-2015, at 04:00 by berner256 ]