How big of a problem are invasive animal species in the National Park System? This week we examine the topic of invasive animal species – think Burmese pythons in Everglades National Park, wild hogs in Great Smoky Mountains National Park, and even feral cats at Cape Hatteras National Seashore – and how the National Park Service is trying to tackle the problem. Traveler's staff looks at some of the most photogenic destinations in the National Park System. And we include some surprise locations.
