One Day at HorrorLand is the sixteenth book in Goosebumps, the series of children's horror fiction novellas created and authored by R. L. Stine. It was adapted into a two-part episode for the television series, which was later released on VHS and DVD. A comic adaptation of the book was included in the graphic novel compilation Terror Trips, part of the Goosebumps Graphix series. There were two video games based on the book.