[computador]

As I am sweating while writing this note, may I recommend Dakar/Senegal where you can have free sauna anywhere. If you step outside, you also get a free tanning session.

[ng55QPSK]

A reasonable sauna temperature is 80°C, a lot of people prefer the 90..95°C range. I have some doubts you reach this without tricks in Senegal.

[karottenreibe]

I bet a few concave mirrors can get the job done!