REDDING, CALIFORNIA - JULY 02: A pickup truck is dwarfed by the tall steep banks at Shasta Lake on July 02, 2021 in Redding, ...

The Lost Sea in Sweetwater, Tennessee, is the largest underground lake in the Northern Hemisphere and remains largely ...

For the first time in nearly 80 years, lake sturgeon — ancient fish that can grow up to a tall man’s length — are once more flowing through the waters of Big Stone Lake, a 26-mile-wide border lake ...