Work on the badly-needed new visitor center and quarry exhibit hall at Dinosaur National Monument is getting underway, and that has prompted some changes for visitors to the park. Here's what you need to know before you visit the area.

There are crocodiles, including some genuinely huge ones, living in South Florida. Not everyone is happy about it, but these fascinating creatures have made a dramatic comeback from near extinction.

While peregrine falcons are the main birds of concern at some Eastern parks, in Wyoming the rangers at Devils Tower National Monument are keeping an eye out for prairie falcons that might be nesting.

One CD-Rom that works with either Mac or PC. Mapping software that let's you zoom in and out, pan right or left, and take a bird's eye 3-D view of the lay of the land. And the ability to load the map onto more than a few GPS units. Has National Geographic hit upon something with its Trails Illustrated Explorer series?