A yellow rat snake in Everglades National Park. But if you do have a fear of snakes (known as ophidiophobia), you should know there are some national parks that are well-known among snake experts ...

And here's what to do if you spot one. Snakes. They're scaly, cold-blooded, fascinating creatures. They smell with their tongue, and some have thermal vision. They also "hear" by sensing vibration, ...