Travel news: Close encounters with sharks, monk seals and jellyfish

In travel news this week, Spain is offering free train journeys, Southwest Airlines is making its vouchers valid forever, and we take a look at the world’s greatest hiking trails and Iceland’s best bathing spots.In travel news this week, Spain is offering free train journeys, Southwest Airlines is making its vouchers valid forever, and we take a look at the world’s greatest hiking trails and Iceland’s best bathing spots.