This is a pretty cool story really but it’s hard to imagine how no one could have seen the artists at work. This had to have taken a while. This aboveground vent belongs to a former nuclear shelter in Prague that was used during the Cold War. The Folimanka Shelter used to be a state secret but now it’s been open to the public as a historical site. This vent however has stuck out for quite a while and no one has seemed to be able to figure out what to do with it until now. As landmarks go it’s