Forget everything you think you know about caves – the largest cave in the USA is on a whole different scale. In this video, we explore its massive chambers, towering formations, and surreal ...

Both Troglocladodus trimblei and Glikmanius careforum, members of the extinct ctenacanth genus (Ctenacanthus), have been ...

"There are actually over 400 caves in this county. This just happens to be the largest of the caves," said Greg Anderson, Assistant Cave Manager. It was discovered by a man named Joe Pettey in ...

Play the USA TODAY Daily Crossword Puzzle. The Decorah Ice Cave entrance is 15 feet high ... It's low at places, so ducking is required. The largest room is 30 feet high and 110 feet long.

The team says it is the largest known piece of cave art in North America, and comparable in size to rock art never thought to exist beyond the American Southwest. Other glyphs—the paper describe ...

The park has the Best Hiking Trail in the nation, as decided by readers in USA TODAY'S 10Best ranking ... bridge and features the second-largest cave in the region, with a 105-foot seasonal ...