It may be hard to find the connection, but rapidly cooling down after taking a super hot shower or sauna is quite invigorating. After all, some even say it's a secret of long life! It worked for the Romans, and now it's working for people in Las Vegas. Enter the Qua Arctic Ice Room, chilled to a comfortable 55 degrees.

The idea here is that when people get roasted in a 200-degree sauna, they can simply take a moment to relax in this cold environment to cool off. With mint-infused air and fabricated snow, the "cold spa" provides a jolt that can make you feel more awake and alert.

Europe is no stranger to extremely cold rooms either. They boast snow rooms below 10 degrees and say it holds benefits for your immune and circulatory systems. Take the Schwaben Quellen spa in Germany, for instance. At two degrees, this is colder than many parts of our country during winter. One thing is for sure: don't shave before you check it out.