Not just something that gets us from point A to point B, bridges are often famous landmarks of an area. Check out Passerelle Leopold-Sedar-Senghor and learn about the long and fascinating history of this structure.
When you've finished at this longstanding structure in Faubourg Saint-Germain, why not check out Eiffel Tower, Louvre Museum, and Arc de Triomphe? They're close to Passerelle Leopold-Sedar-Senghor and also popular with many travelers.