Summertime is summed up by nonstop heat and you trying to figure out any way to cool down.

One of the best ways to cool off is to find a good swimming hole. According to MSN Lifestyle, we have one of the best swimming holes in the United States close by.

They recommend checking out the Firehole River Swimming Hole in Yellowstone National Park.

There are no lifeguards, so make sure you aren't putting yourself in any danger, and remember, no cliff jumping.

For more details, check out MSN Lifestyle.