You know what’s missing from doors these days? Keyholes big enough that you can actually look through. Back in the good old days, if you wondered what was going on behind a locked door, you’d just kneel down and take a look through the keyhole. The last time I went door shopping, I didn’t find a single one that I could peer through even a little. Heck, most interior doors don’t even use keys. What is this world coming to? Well an architect named Hideyuki Nakayama has a solution for this problem.
Instead of adding large keyholes to doors, he’s turned the doorknobs into a pair of connected glass globes. This allows you to see what’s going on in the other room simply by looking at the knob itself. Unfortunately, there’s no word as to whether or not these will actually be mass-produced and sold.