CANALS
| Date | Clue |
|---|---|
| 2020-07-15 | Some shortcuts for ships |
| 2017-10-01 | Notable features of Stockholm and Amsterdam |
| 2015-12-27 | Mars features, mistakenly |
| 2011-12-05 | Features of Venice |
| 2011-04-01 | Lock holders |
| 2011-03-14 | Venice attractions |
| 2010-02-21 | Shortcuts for ships |
| 2007-08-27 | "Streets" of Venice |
| 2006-12-12 | Lock sites |
| 1999-01-16 | Lock sites |
| 1996-07-08 | Erie and Suez |