Piss - is an outdoor 2004 sculpture and fountain by Czech artist David Černý, installed outside the Franz Kafka Museum in the Lesser Town.
The fountain's basin is made of bronze and shaped like the Czech Republic. Standing in the fountain, opposite one another, are mechanical statues of men, standing 210 centimetres (6 ft 11 in) tall with bronze penises, urinating.
One of them in what seems to be urinating the Prague area, the other other one doing the same in Brno (the second largest city in Czechia).
Visitors to the area used to be able to command the men to write messages into the water via SMS....not sure if that is still the case. read more