If you've ever wanted to be in the room where it happens, you'll want to stop by the Treaty Room in the White House. This room is designated to be a private study for the president — a space to go over reports, have confidential meetings, review speeches, and hold family gatherings. Per the White House Historical Association, it's one of the rooms that holds the most history in the White House. The Treaty Room has witnessed Spain and the United States make peace in 1898, the Limited Nuclear Test Ban Treaty the United States and Soviet Union agreed upon back in 1963, along with countless cabinet meetings during the presidencies of William McKinley, Rutherford Hayes, and Ulysses Grant.