Doug Perrine / Pahoehoe lava flows off Lae' apuki bench into sea, Kilauea volcano, Hawaii, USA. Jan 2000

Anup Shah / Aerial view of Ol Doinyo Lengai (The Mountain of God) Volcano, Rift Valley, Tanzania. Note- light gray flows known as 'squeeze-ups' from the highly fluid lava, still active.

Doug Perrine / Pahoehoe lava flows off Lae' apuki bench into sea, at night, Kilauea active volcano, Hawaii, USA. Jan 2000

Doug Perrine / Pahoehoe lava flows off Lae' apuki bench into sea, Kilauea active volcano, Hawaii, USA. Jan 2000

Tui De Roy / Lava Cactus (Brachycereus nesioticus) endemic pioneering species growing only on young lava flows, Bartolome Island, Galapagos Islands, Ecuador

Gavin Hellier / The Blue Lagoon, Iceland's most famous tourist attraction is located among the black lava flows outside Reykjavik. The geothermal spa owes its existence to the Svartsengi geothermal power plant powere...

Gavin Hellier / The Blue Lagoon, Iceland's most famous tourist attraction is located among the black lava flows outside Reykjavik. The geothermal spa owes its existence to the Svartsengi geothermal power plant powere...

Inaki Relanzon / Solidified lava flows meeting the sea. The South coast of the Hierro Island, Canary Islands, , February 2011.

Oriol Alamany / Rocks formed from lava flows on the southwest coast of Easter Island Pacific ocean, November 2004

Oriol Alamany / Rocks formed from lava flows on the southwest coast of Easter Island , Pacific ocean, November 2004

Pete Oxford / Lava Flows on Wolf Volcano, Isabela Island, Galapagos Islands, Ecuador, South America, 2008

Richard Du Toit / Aerial view of black lava flows, Lake Turkana, Great Rift Valley, NW Kenya

Jabruson / Lava flow destroying trees and vegetation as it flows through forest, Kimanura volcanic eruption, Virunga NP, Democratic Republic of Congo (formerly Zaire)

Anup Shah / Aerial view of Andrew's volcano and lava flows, Lake Turkana, Great Rift Valley, Kenya

Anup Shah / Aerial view of volcano and old lava flows, Great Rift Valley, Kenya

Jabruson / Lava flow destroying trees and vegetation as if flows down mountain side, Kimanura volcano, Virunga NP, Democratic Republic of Congo (formerly Zaire)

Doug Perrine / Pahoehoe lava flows into Lae' apuki bench, Kilauea volcano, Hawaii, USA. Jan 2000

Doug Perrine / Pahoehoe lava flows into Lae' apuki bench, Kilauea volcano, Hawaii, USA. Jan 2000

Doug Perrine / Pahoehoe lava flows into Lae' apuki bench, Kilauea volcano, Hawaii, USA. Jan 2000

Doug Perrine / Pahoehoe lava flows off Lae' apuki bench into sea, Kilauea volcano, Hawaii, USA. Jan 2000

Doug Perrine / Pahoehoe lava flows into Lae' apuki bench, Kilauea volcano, Hawaii, USA. Jan 2000

Anup Shah / Aerial view of Ol Doinyo Lengai'(The Mountain of God) Volcano, Rift Valley, Tanzania. Note - light gray flows known as 'squeeze-ups' from the highly fluid lava, still active.

Tui De Roy / Swift river of lava flows past old stand of trees on previously vegetated cone, Fernandina Island, Galapagos Islands, Ecuador

Tui De Roy / River of lava flows around previously vegetated cone down shield volcano flank scalding Bursera trees, Cape Hammond, Fernandina Island, Galapagos Islands, Ecuador

Tui De Roy / River of lava flows around previously vegetated cone down shield volcano flank scalding Bursera trees, Cape Hammond, Fernandina Island, Galapagos Islands, Ecuador

Tui De Roy / Dawn view of lava flows entering the sea, February 1995, Cape Hammond, Galapagos Islands, Ecuador

Doug Perrine / Lava flows off Lae'apuki Bench into sea during continuing eruption from Pu'u O'o, Kilauea Volcano, Hawaii Volanoes NP, Big Island of Hawaii 2000 (Non-ex).

Neil Lucas / Lava flows from errupting Arenal volcano at night. Costa Rica

Neil Lucas / Lava flows from errupting Arenal volcano at night. Costa Rica

Tui De Roy / Brown Pelican (Pelecanus occidentalis) group flocking to hot waters where lava flows enter the sea attracted by dead fish, Cape Hammond, Fernandina Island, Galapagos Islands, Ecuador

Tui De Roy / Cactus (Jasminocereus sp) on steep eastern flank of Wolf Volcano, which is streaked with recent lava flows, Isabella Island, Galapagos Islands, Ecuador