Hawaii Volcanoes: walking on an island that is still being formed
Two of the most active volcanoes in the world on the Big Island of Hawaii: steaming craters, frozen lava flows down to the ocean and, on some days, molten lava.
Haleakalā: watching the sun rise from a sleeping volcano
A 3,000-metre volcano on the island of Maui, with a crater of red cinders at the summit and a coast of waterfalls and bamboo at the very bottom.