On a rainy gray day in Paris, one of the most fitting places to wander is the Montmartre Cemetary near Sacré Coeur.
If you want to truly explore the grounds, set aside over an hour to see the graves of artist Degas, composer Berlioz, and filmmaker Truffaut, along with 22,000 others covering about 25 acres.
Paupers have markers throughout,
some graves are completely covered in fresh flowers.
Nearby are the steps up to Sacré Coeur
(there's a funicular next to it which you can take for the price of a metro ticket).
This is the only hill in central Paris, so lots of steps throughout this area.
Nice to end the afternoon with something sweet, like a glass of rosé and a waffle with fresh fruit at Le Pain Quotidien :)