Active volcanoes on the island nation of Vanuatu include Mount Garet and Mount Yasur.
The Hawaiian Islands make up the southern tip of a 6,000-km-long volcanic chain; geologist Guy de Saint Cyr explores a lava lake.
- Giants of Africa
The city of Goma in the Democratic Republic of the Congo rests at the foot of the active Nyiragongo volcano.
- The Horn of Africa
Three tectonic plates intersect in the Horn of Africa; Erta Ale in Ethiopia houses one of the world's few lava lakes; Dallol's summit lies below sea level.