The Canary Islands not only boast the third largest volcano in the world, but also the largest natural underwater lava tunnel. Mount Teide, the third largest volcano, resides in Tenerife ...

Found in regions around Earth, lava tubes are created by molten rock, or magma, leaking up near or onto a world's surface, ...

Author Joshua Foer explores Kazumura, the world’s longest mapped lava tube, which stretches more than 40 miles and in places is the size of a subway tunnel. Its grooved walls took shape in the ...

Hawaii is home to some of the most incredible lava tubes that are open to exploration. These include Thurston Lava Tube in ...