How can you fight the best the sultry heat of a sauna? Well, there really to say that a frozen river would be the best choice.
In Berlin, in fact, in the great complex of Arena Berlin, is a spa with sauna situated on the river Spree, almost always frozen in these times of the year and surrounded by cold temperatures.
Berliners and tourists, can enjoy the benefits of the sauna while admiring the huge windows of the charming city ice, if you want, then you can take a look outside, because the large sauna is equipped with an extension that ends directly on ice.
A few days ago this was considered by the media as the most beautiful and fascinating sauna of the world.