Joel: I think I heard a crack.
Clementine: It's not gonna crack, or break, or ... it's so thick. Show me which constellations you know.
Joel: Um... I don't ... know any.
Clementine: Show me which ones you know.
— Clementine (Kate Winslet) and Joel (Jim Carrey) in the 2004 film Eternal Sunshine of the Spotless Mind. The famous stargazing scene – pictured on the movie's poster – takes place on the frozen Charles River.
Although several people run or bike across the frozen Charles River every winter, ice skating is not allowed. Thanks to the Boston Public Library's photo archive, it's easy to understand why.