While Antarctica might get all the buzz as an expedition cruise destination, the Great Lakes is an underrated gem—and ...

Once the world's fourth-largest lake, the Aral Sea is now a barren wasteland. This is the story of its dramatic collapse—one of the worst environmental disasters in history.

GEOQUIZ: What is the name of the world’s deepest lake, and where is it located? Answer: Lake Baikal. It is located in southern Siberia in Russia, north of the Mongolian border, and is 5,315 feet deep.