An aqueduct is a water supply or navigable channel constructed to convey water. In modern engineering, the term is used for any system of pipes, ditches, canals, tunnels, and other structures used for this purpose. Aqueducts must span a crossing at the same level as the watercourses on each end.
1. Valens Aqueduct, Turkey

2. Kavala Aqueduct, Greece

3. Águas Livres Aqueduct, Portugal

4. Roquefavour Aqueduct, France

5. Pegões Aqueduct, Portugal

6. Aqueduct of Vanvitelli, Italy

7. Eagle Aqueduct, Spain

8. Pont du Gard, France

9. Aqueduct of Santiago de Querétaro, Mexico

10. Aqueduct of Segovia, Spain
