As sacred places go, the Trinity site where humanity exploded its first atomic device can seem flat and isolated from the rest of the world. And yet the world was forever changed by what happened there in 1945. This 7,300-word essay was written in 2004 shortly after I visited the site where I was given a tour by one of the last living witnesses to the Trinity test. Originally written and published online a short time after my visit, the piece was later republished online to the fan blog, Passages in the Void. Now, for the first time, it has been reformatted for easy reading on your favorite devices.