If your teen wants “a little bit of everything,” this is the winning set. Think Prague rooftops, Vienna’s palaces, Slovenia’s Lake Bled kayaks, Croatia’s island swims, and maybe a quick hop to Athens. Programs vary in length—some wrap after two weeks in Croatia, others stretch nearly a month to take in Greece’s white-washed villages. Structure in the mornings, spontaneity in the evenings, and plenty of active thrills keep the whole crew engaged.