The guys at Oddee have put together a list of 12 of the most "creative" staircases that designers have conjured up. Creative... yes. Deadly... you bet.
My personal choice for the deadliest staircase has to go to the Samlot. It can kill or maim you in two ways: either you fall off it completely, or you over-step and catch your leg in the open gap between each stair. But, again, that is just my opinion. Check out the rest of the list to determine which design you think best sacrifices safety for aesthetics. I also humbly submit lucky number 13 for your consideration. [Oddee via Fark]