
Seine Bridges & Quays Walk offers some history & culture, but not enough to make it the reason to go.
Strolling the Seine quays past the Pont Neuf, Pont des Arts and Pont Alexandre III, with booksellers' green stalls and bridge-framed Eiffel views, is the cheapest great thing to do in Paris. Best at golden hour; the riverbanks are a UNESCO World Heritage Site.