If you are familiar with 1963 U.S. history, you are probably familiar with this Dallas landmark. It was the Texas School Book Repository where Lee Harvey Oswald worked as a clerk and location where he allegedly assassinated President Kennedy from one of the open windows on the 6th floor.
This site is now a historical landmark with this plaque posted outside the building. Noticed someone underlined the word "allegedly".
The 6th floor of this building has been converted into a museum while the other floors are administration offices. The museum does not allow visitors to take photos, so here is an exterior shot. I visited the museum on a weekday and to my surprise, it was packed. Although the museum came about under morbid circumstances, it was quite informative. It will pique the interest of history buffs and conspiracy theorists alike. Here is a link to a brief history of this building.