Nature

The three Seine bathing sites and how they work, the riverside park that replaced the expressways, the Pont Neuf, the Pont d'Austerlitz rebuilt in stone and the four Pegasus of the Pont Alexandre III, where the river really rises, the booksellers, and the World Heritage corridor.

The aquarium older accounts describe has largely ceased to exist — no platypus, no crocodile, no seal, no tiger or lemon shark, and not one of the five zone names in circulation survives. Of the two rescued dugongs, one has died and the other has moved out of the exhibit built for them. One warning about figures: the operator's own website gives three different species counts on three different pages.