In case you are a frequent traveler and like vacationing with your family or friends, you sure are supposed to know about the place you are about to travel. Here is a collection of articles which will help you find helpful information like modes of travel, best season to visit, etc about these places.
Did we mention that Yellowstone is sitting on an active supervolcano? If the Yellowstone Caldera were to explode, it would not only kill basically everyone in Wyoming, but the ash would block out the sun, devastating agriculture nationwide and causing a massive food shortage.
America's Most Beautiful Park May Be Most Dangerous

Now, we're not saying you shouldn't go to Yellowstone. It's a beautiful forest haven and a wonderful vacation spot. But when you go there, make sure to stay away from the animals. And the hot springs. And the supervolcano.