Guano. If you look into the history of Carlsbad Caverns, you will most likely come across this term. In fact, some of the early visitors to the large underground cave system ...

Charming towns with Wild West inspiration are scattered across the U.S. From saloon-style doors to wooden Western downtown ...

National Geographic's 100 best images of the year–curated from 106 photographers, 121 stories, and more than two million photographs. Leonardo’s “Mona Lisa” is believed to depict Lisa ...