Price Discrimination: Russians Get a Discount
The picture above (click to enlarge) shows a sign at St. Issac's Cathedral in St. Petersburg, Russia. The church, designed to accommodate 14,000 standing worshipers, was closed in the early 1930s and reopened as a museum.
The top sign says "ENTRANCE TO THE MUSEUM" in Russian. If you can read Russian, you enter to the left and go to a separate ticket counter, which has a lower entrance fee than if you speak English, and enter to the right.