| 2025-12-14 | River that borders the Black Forest |
| 2024-07-01 | River alongside many German vineyards |
| 2023-09-24 | River forming the Swiss/Liechtenstein border |
| 2023-05-26 | Cologne's place |
| 2022-02-27 | Europe's Three Countries Bridge crosses it |
| 2021-10-11 | German river to the North Sea |
| 2020-11-29 | River near Rotterdam |
| 2019-11-11 | 760-mile river that starts in Switzerland |
| 2018-07-28 | River crossed in 1945's Operation Plunder |
| 2018-02-19 | River of Cologne |
| 2017-05-24 | Major river starting in SE Switzerland |
| 2015-06-26 | Locale of some Swiss banks |
| 2015-01-30 | ___-Main-Danube Canal |
| 2014-10-15 | Swiss/Austrian border river |
| 2014-09-06 | Type of white wine |
| 2013-10-29 | ___ Valley, German wine region |
| 2011-07-25 | German river whose valley is known for wine |
| 2010-12-12 | Lorelei's locale |
| 2010-09-26 | Liechtenstein's western border |
| 2010-05-01 | Cologne is found on it |
| 2009-07-26 | River that flows past more than 40 castles |
| 2009-07-05 | River straddled by Basel, Switzerland |
| 2009-04-07 | Riesling wines are produced in its valley |
| 2006-06-23 | Main outlet |
| 2004-01-01 | Schaffhausen's river |
| 2003-07-28 | German wine valley |
| 2002-07-20 | Kind of wine |
| 2002-07-17 | River past Liechtenstein |
| 2002-04-24 | Lorelei's river |
| 2001-05-07 | German wine valley |
| 1999-02-03 | River through Switzerland |
| 1997-04-08 | Kind of wine |
| 1996-01-26 | View from Basel |