This 18-meter-deep well carved out in clayey rock Argonit used to be a place where kids used to walk, tear notes with their sins up and throw scraps down before Easter after the confession.

Monastic well put a bee even in prominent scientists’ bonnets. Water droplets fall on its surface, even though the weather is dry and sunny. This mystery was discovered by Robert F. Holub, a professor of physics from the American Clarkson University, during a visit of a Baroque monument of Broumov. The mystery did not let him sleep because the observed phenomenon was repeated on his subsequent visits. And so, together with colleague Jan Hovorka from the Faculty of Sciences of Charles University they decided to investigate the phenomenon scientifically.

During the first measurement the scientists firstly had to exclude if the water was dripping into the well from the surrounding objects, or from some inflow and thus removed all vegetation, thoroughly inspected the wall of the well and performed temperature measurements. The first measurements showed how the temperature and humidity of the air varied with its depth, but also they found out that much more detailed analysis would have been needed. This happened one year later whereby the size, number and rate at which droplets were falling on the surface were also measured.

"We were able to characterize the phenomenon and to exclude certain types of causes. Previous researches, however, rather aroused more questions than answered them. We do not know even whether this phenomenon occurs only in the well in the Broumov monastery, or whether it "rains" in other, large enough wells, and there are plenty of them found at Czech castles and chateaus. To do this we need to obtain grant support, however, nobody would give us any money to have a research done in one well. Therefore we financed the research and now we are waiting for a reaction from the article examining the phenomenon in the scientific magazine Journal of Aerosol Science," summarises researcher Jan Hovorka.