It was Travis Marshall's place of employment, specifically in the Museum of Art.
When Dexter Morgan examines the angel wings from The Doomsday Killer's most recent killing, he finds that a unique glue was used to attach a piece of the wing. This leads him to the Miami Cultural Center, an art museum filled with artifacts. A docent takes him to a room where an informative film is playing. As Dexter watches the film, he recognizes a man from the crime scene doing a repair. He discovers that his name is Travis Marshall, a conservator in papers, bindings, and rare books who works at the museum.
To attract Travis Marshall's attention, Dexter creates his own tableau at the Miami Cultural Center. He attaches the three-year-old hand of Professor James Gellar to an angel statue and paints the number "666" in blood on its forehead. This leads to Travis viewing Dexter as The Beast.
At the scene, Debra orders officers to sweep the area for Gellar’s body. Dexter knows they won't find it since he left Gellar's body in pieces in the swamp.
- The actual filming location is an art gallery in Long Beach, California.