Luigi, thanks for the info! I have been following your trip details with great interest.
I will be passing through Prague in a couple weeks and was thinking about going out to the radon spa just for the day to check it out. If the place looks good - which I am sure it will - I can more easily convince my husband that we can come back for the full stay sometime soon (we would want to be able to bring our laptops and work remotely for that time period so a "look see" first is definitely ideal).
Based on your experience - do you think that they would show us around if we stopped in?