When School's Out, PGL's In! With more than 50 years experience pioneering children's adventure and activity holidays, PGL Travel is the UK's leading operator in adventure holidays for unaccompanied 7 to 17 year olds. A PGL holiday can help children discover that first taste of independence, build self-confidence and make friends through a broad range of exciting activities. Children and teenagers enjoy our holidays so much that they return again and again.