Visit a live volcano, Costa Rica/Hawaii/Réunion
Smell the sulphur, feel the earth tremble and watch as molten lava spews from the ground. This once-in-a-lifetime experience is not for the faint of heart. But to see the Earth recreating itself right in front of you is an awe-inspiring sight, never forgotten.
Popular erupting volcano hikes include Hawaii Volcanoes national park, which is safe enough to bring the family along but active enough to see molten lava flowing into the sea; a more fearsome trek through Volcán Arenal national park in Costa Rica, which contains one of the most active volcanoes in the world and is also celebrated for its hot springs; and Piton de la Fournaise Volcano on the island of Réunion, east of Madagascar, which erupts in fountains of lava with surprising regularity.