National Geographic: Wild South West

In less than 100 miles; the Tale of Two Extremes takes us from the lowest and hottest point in the lower 48; to its highest and coldest peak. This is one of five unlikely journeys we explore for a unique look at what attracts wildlife to seemingly inhospitable landscapes. From the fur-clad bears on the treeless mountain tops of Big Bend National Park; to the twenty million bats that pour out of Bracken Cave every night to form the largest concentrations of mammals on the planet - WILD SOUTHWEST delivers a surprise twist at every turn.