Monument Valley, Arizona/Utah Monument Valley, straddling the Arizona-Utah border, is an iconic symbol of the American West.

From Acadia to Zion, the U.S. has some pretty majestic national parks. Here’s one fun fact about every single one—plus a map ...

Mars may have once had a vast, ice-free ocean, according to new evidence from China’s Zhurong rover. Using ground-penetrating ...

Located in Yosemite National Park, the Grand Prismatic Spring is just one of many natural wonders that inspire visitors. The rainbow-colored hot spring is actually the largest in America (about as ...