Sandcastle (French: '''Château de sable''') is a 2011 French-language graphic novel published by, written by from France and drawn by Frederik Peeters from Switzerland. Nora Mahony translated the work into English, with that version released in 2013.[1] SelfMadeHero published the English version.
It is the inspiration for the 2021 American film Old, which has some differences in the character composition.[1]
The main setting is a beach, which Nitish Pahwa of Slate states "is presumably set somewhere in France", with relatively little of the story taking place in other locations.[1] On that beach, people age very quickly and cannot leave. A dead body of a woman who goes skinny dipping appears early in the story. The main characters realise they are trapped and do not escape.[1]
Daniel Kurland of Comic Book Resources wrote that in 2021 the comic was "gaining a larger appreciation" and that until the release of Old, the comic had "flown under the radar for a lot of people".[2]
Morning Star wrote that the work is "beautifully drawn".[3]
Comic Book Resources stated that the work "feels like you should be seeing it in 35 MM at the Cannes Film Festival."[4]