A breathtaking astronaut photo reveals El Salvador’s Lake Coatepeque—an ancient volcanic crater lake that sometimes ...

Just inland from the Pacific coast of El Salvador, the striking blue waters of Lake Coatepeque fill part of a caldera of the same name. An astronaut aboard the International Space Station took this ...

Formed by a volcanic collapse thousands of years ago, Crater Lake sits within a vast caldera in Oregon. Its clarity and depth make it one of the most studied and admired lakes in the world.

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Michael Poland, geophysicist with the ...

Located in the Cotopaxi Province of central Ecuador, Quilotoa Lake is a stunning water-filled caldera formed from a collapsed ...