The Long Chair, created by Schemata Architecture in Tokyo, is devilishly simple: take a single tube of stainless steel and bend it into a chair profile over and over. Stack enough of these chair outlines side by side, and you have an actual chair. Stack even more, and you have a bench. Even more, and you have a reeeeeeally long bench.
Probably a pretty uncomfortable bench, I'm guessing — not to mention one that you'd have trouble moving and no doubt gets really cold in the winter. This one's definitely more cool art project than practical urban fixture, but the wicked shadows in the gallery below still make us want one.