1. Volcano, TanzaniaPhoto: Olivier Grunewald A camera’s long nighttime exposure reveals the red glow of lava spilling from Mount Ol Doinyo Lengai in Tanzania’s Rift Valley. The volcano’s lava, which appears brown to the naked eye, has the consistency of olive oil.

    Volcano, Tanzania
    Photo: Olivier Grunewald

    A camera’s long nighttime exposure reveals the red glow of lava spilling from Mount Ol Doinyo Lengai in Tanzania’s Rift Valley. The volcano’s lava, which appears brown to the naked eye, has the consistency of olive oil.