Paris' mayor Anne Hidalgo, left, and President of the Paris 2024 Olympics and Paralympics Organizing Committee Tony Estanguet the Austerlitz inaugurate the wastewater and rainwater storage basin, which is intended to make the Seine river swimmable during the Paris 2024 Olympic Games, in Paris, Thursday, May 2, 2024. The works underground next to Paris' Austerlitz train station are part of a 1.5 billion euro effort to clean up the Seine so it can host marathon swimming and triathlon events at the July 26-Aug 11 Summer Games and be opened to the general public for swimming from 2025. (Stephane de Sakutin, Pool via AP)
Paris' mayor Anne Hidalgo and other officials attend the inauguration of the Austerlitz wastewater and rainwater storage basin, which is intended to make the Seine river swimmable during the Paris 2024 Olympic Games, in Paris, Thursday, May 2, 2024. The works underground next to Paris' Austerlitz train station are part of a 1.5 billion euro effort to clean up the Seine so it can host marathon swimming and triathlon events at the July 26-Aug 11 Summer Games and be opened to the general public for swimming from 2025. (Stephane de Sakutin, Pool via AP)
A man walks in the Austerlitz wastewater and rainwater storage basin, which is intended to make the Seine river swimmable during the Paris 2024 Olympic Games, in Paris, during its inauguration Thursday, May 2, 2024. The works underground next to Paris' Austerlitz train station are part of a 1.5 billion euro effort to clean up the Seine so it can host marathon swimming and triathlon events at the July 26-Aug 11 Summer Games and be opened to the general public for swimming from 2025. (Stephane de Sakutin, Pool via AP)
A man walks in the Austerlitz wastewater and rainwater storage basin, which is intended to make the Seine river swimmable during the Paris 2024 Olympic Games, in Paris, during its inauguration Thursday, May 2, 2024. The works underground next to Paris' Austerlitz train station are part of a 1.5 billion euro effort to clean up the Seine so it can host marathon swimming and triathlon events at the July 26-Aug 11 Summer Games and be opened to the general public for swimming from 2025. (Stephane de Sakutin, Pool via AP)
The Austerlitz wastewater and rainwater storage basin, which is intended to make the Seine river swimmable during the Paris 2024 Olympic Games, is seen during its inauguration Thursday, May 2, 2024 in Paris. The works underground next to Paris' Austerlitz train station are part of a 1.5 billion euro effort to clean up the Seine so it can host marathon swimming and triathlon events at the July 26-Aug 11 Summer Games and be opened to the general public for swimming from 2025. (AP Photo/Christophe Ena)
The Austerlitz wastewater and rainwater storage basin, which is intended to make the Seine river swimmable during the Paris 2024 Olympic Games, is seen during its inauguration Thursday, May 2, 2024 in Paris. The works underground next to Paris' Austerlitz train station are part of a 1.5 billion euro effort to clean up the Seine so it can host marathon swimming and triathlon events at the July 26-Aug 11 Summer Games and be opened to the general public for swimming from 2025. (Stephane de Sakutin, Pool via AP)