You know that very special rock you couldn’t resist picking up and taking home? The one with the uncanny shape, the surprising colors, the strange veins?

We made it to North Cascades National Park in Washington – and we have to say, don’t come here... unless you're ready to be ...

Lanzarote’s volcanoes have inspired locals to make everything from art to wine. A tour of the island reveals the landscape’s ...

Seismic wave measurements suggest the supervolcano beneath the popular national park is unlikely to erupt any time soon ...