Imagine a lake of bright yellow-orange lava with a molten fountain gushing 1,900 feet (580m) in the air. Now imagine walking across a smoothed solid rock surface where that lava lake once churned, guided by ahu (rock cairns) past a tall cinder cone as you aim toward the other side. That’s the experience of the Kīlauea Iki Trail in Hawai’i Volcanoes National Park.