Screw Dubai. Bouncing Red Ball has a a selection of some of thinnest buildings in the world, all in Japan, where land is so scarce. We've featured other cool ones, but these defy belief.

And you thought your apartment was small. We have added the mountain-side house, but head to Bouncing Red Ball for the rest of their selection. [Bouncing Red Ball]

My dear friend Anna sent me this one taken in Paris (thank you!) If you have any other really cool ones like this, send them to me at my email address.