Largest crossword (unpublished)
Who
Hristo A. Yonitsov
Where
Bulgaria (Sofia)
When

The largest unpublished crossword has 93,769 clues, created by Hristo A. Yonitsov (Bulgaria), as verified in Sofia, Bulgaria, on 3 June 2014.

The crossword is 300 metres long, and is spread over 1000 sheets of paper. The effort took Hristo 14 years to complete, and many of the words were found in trips to the library.