The Slipside Water Park is a water park Greg and Rodrick went when they were little kids. Both have bad memories from it. Greg's is because he didn't go on any rides with Grandpa because of a sign he that said Under 48" must be accompined by adult, Greg thought that meant under age 48, which turned out to be 48 inches. And Rodrick's is because when his band, Löded Diper, were playing there, bubbles were used instead of the requested dry ice "smoke". The park appears in Diary of a Wimpy Kid: Dog Days. One day in the summer holiday, Susan takes the whole family there for a family outing. However, it closes early because of lightning. When they got through, Greg convinced his mom to get a double stroller.