This style of elevator, that I've only seen in the Czech Republic, operates in perpetual motion, with the cars operating in a circle, one side of cars (more than one per floor), running up while the others run down. This one has been shut down for obvious safety reasons, but I know of at least one other that was still operating as recently as 2006, and you can see one in the movie "Kafka." This one is in the old DPP office building next to Vltavska tram and metro station.