Instagram is big among foodies, vacationers, and rich kids.

It's also popular on Wall Street, as we recently discovered when we plugged the names and addresses of a few big-bank headquarters into Instagram's location and tag search fields.

The Instagrams we found weren't incriminating (no Hefe-filtered Libor-rigging screenshots) but they did capture the ground-level reality of life on Wall Street. There were the quotidian scenes you'd expect — buzzing trading floors, late-night Excel sessions — and some odder ones, like a close-up of a Goldman Sachs urinal.

We also found Lloyd Blankfein's son.