The unforgiving Border Swamp that resides between the Texas - Louisiana state lines is home to not only an infamous history, but wild creatures as well. Episode 5 of 5 season 3.

The unforgiving Border Swamp that resides between the Texas - Louisiana state lines is home to not only an infamous history, but wild creatures as well. Episode 5 of 5 season 3.

Texas is the frontline for a summer invasion: millions of free-tailed bats descend upon Bracken Cave, creating the largest bat colony on Planet Earth. Episode 4 of 5 season 3.

Texas is the frontline for a summer invasion: millions of free-tailed bats descend upon Bracken Cave, creating the largest bat colony on Planet Earth. Episode 4 of 5 season 3.

Texas is the frontline for a summer invasion: millions of free-tailed bats descend upon Bracken Cave, creating the largest bat colony on Planet Earth. Episode 4 of 5 season 3.

Texas is the frontline for a summer invasion: millions of free-tailed bats descend upon Bracken Cave, creating the largest bat colony on Planet Earth. Episode 4 of 5 season 3.

Texas is the frontline for a summer invasion: millions of free-tailed bats descend upon Bracken Cave, creating the largest bat colony on Planet Earth. Episode 4 of 5 season 3.

The most beautiful secret in Texas hides along the border, where the Rio Grande meets mountains: Big Bend. This desert Eden has long thrived, concealed until now. Episode 3 of 5 season 3.

The most beautiful secret in Texas hides along the border, where the Rio Grande meets mountains: Big Bend. This desert Eden has long thrived, concealed until now. Episode 3 of 5 season 3.

The most beautiful secret in Texas hides along the border, where the Rio Grande meets mountains: Big Bend. This desert Eden has long thrived, concealed until now. Episode 3 of 5 season 3.

The most beautiful secret in Texas hides along the border, where the Rio Grande meets mountains: Big Bend. This desert Eden has long thrived, concealed until now. Episode 3 of 5 season 3.

The most beautiful secret in Texas hides along the border, where the Rio Grande meets mountains: Big Bend. This desert Eden has long thrived, concealed until now. Episode 3 of 5 season 3.

The rolling plains of the Texas panhandle belong to more than cattle and cowboys- this is also the land of claw, spine, and fang. Episode 2 of 5 season 3.

The rolling plains of the Texas panhandle belong to more than cattle and cowboys- this is also the land of claw, spine, and fang. Episode 2 of 5 season 3.

The rolling plains of the Texas panhandle belong to more than cattle and cowboys- this is also the land of claw, spine, and fang. Episode 2 of 5 season 3.

The rolling plains of the Texas panhandle belong to more than cattle and cowboys- this is also the land of claw, spine, and fang. Episode 2 of 5 season 3.

The rolling plains of the Texas panhandle belong to more than cattle and cowboys- this is also the land of claw, spine, and fang. Episode 2 of 5 season 3.

Between Death Valley's searing temperatures and the alpine air of Mount Whitney lies a 146-mile stretch that only the hardiest can survive. Episode 1 of 5 season 3.

Between Death Valley's searing temperatures and the alpine air of Mount Whitney lies a 146-mile stretch that only the hardiest can survive. Episode 1 of 5 season 3.

Between Death Valley's searing temperatures and the alpine air of Mount Whitney lies a 146-mile stretch that only the hardiest can survive. Episode 1 of 5 season 3.

Between Death Valley's searing temperatures and the alpine air of Mount Whitney lies a 146-mile stretch that only the hardiest can survive. Episode 1 of 5 season 3.

Between Death Valley's searing temperatures and the alpine air of Mount Whitney lies a 146-mile stretch that only the hardiest can survive. Episode 1 of 5 season 3.