These guys…

…are really difficult to find, I admit, this is unfair. It’s not even cold enough. I give a few hints: they are at a very prominent coast line and only show up under special weather conditions, when the sea is still open, but the air is freezing. Nature’s own ice art. I don’t expect any…

Where is…

… this door located in Helsinki city-center? Missä tämä ovi sijaitsee Helsingin Keskustassa? Wo im Zentrum von Helsinki befindet sich diese Tür?