From beautiful beaches to majestic mountains, these are the most popular—and most beloved—state parks across the United ...

We hiked deep into the woods to explore a 170-foot hole surrounded by mystery and legend—and what we found underground was breathtaking. Hidden beneath the surface was a crystal-filled cave system ...

The cave was apparently once believed to be an entrance into the underworld by the Lipan Apache, according to Jasper Gaffney, ...

Mesa Verde National Park is home to 700-year-old cliffside pueblos. From what to eat to where to stay, here's what to know ...