Solidified lava on the popular walk to the crater on Piton-de-la-Fournaise, one of the world's most active volcanoes, La Reunion.

- Image ID: W46D2P
Solidified lava on the popular walk to the crater on Piton-de-la-Fournaise, one of the world's most active volcanoes, La Reunion.
Mike Robinson / Alamy Stock Photo
Image ID: W46D2P
Location: Piton-de-la-Fournaise volcano, La Reunion.