3. Busy Home
Would you believe us if we told you that the White House is actually the busiest and most popular residence in the United States? Well, it would only make sense if you take into account the fact that there are always a ton of tourists hoping to snap pics of the White House. However, aside from that, the White House staffers also answer around 65,000 letters, 3,500 phone calls, 100,000 emails, and 1,000 faxes a day.