Mondo Knows Facts
Lake Constance has no agreed international border
Austria, Germany and Switzerland share the water but never signed a treaty dividing it Switzerland holds that the boundary runs down the middle of the lake. Austria and Germany treat the open water as a condominium shared by all three states, with borders only near the shore. In practice boats and swimmers cross freely and no line is policed. It sits in Mondo's world geography collection, one of 200 facts that each trace back to the reference below.
Where this comes from
International Hydrographic Organization
Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.
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🗺️ World Geographyfact 106 of 200
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Tags: borders, lakes, europe
Lake Constance has no agreed international border: the short answers
- Where does this come from, and can I check it?
- Austria, Germany and Switzerland share the water but never signed a treaty dividing it. The figure is taken from International Hydrographic Organization, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
- Is this really a world geography fact?
- Yes. It sits on the World Geography shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
- What else can I read about it?
- The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.