Located at the corner of 11th and O, 1337 11th Street is an eyesore. The upper floors are vacant and boarded (thanks to ANC2f's diligent efforts, documented here). The ground floor boasts the foreboading "Annex Market," a store that, according to an outside sign, moved from 1400 7th Street some time ago.
It's a shame that a building with such beautiful bones continues to sit in such a poor, under-utilized state.
Note - the above pictures were taken a few months ago.