I don’t know where the center of the universe is (it might not even be knowable) but I know where The Center of The Universe is, exactly! Here’s a picture of it, in fact:
Yup, that’s it! Not what you were expecting? The singularity that created the expanding universe is likely still located at its center, and this structure is both singular, and labeled:
I work about 100 meters from The Center of The Universe, and you can visit it, as it’s located on the campus of the University of New Mexico in Albuquerque.