ISLA: Yes, because it’s a volcanic plug. A plug forms when molten lava and hot ash gets stuck as an upright gooey mess in the vent of a volcano. That’s the channel inside a volcano that opens ...

Rising tall from the sea and covered in emerald-colored vegetation, these volcanic plugs (or land formations made out of volcanic materials) are the most iconic sight in all of St. Lucia.

The park's namesake peak is the one of the largest plug dome volcanoes in the world — a type of volcano that grows in size from layers of its own lava building on top of each other over time.

Four types of volcanoes—shield, composite, cinder cone, and plug dome—can be found in Lassen Volcanic National Park, where they literally bubble and steam.