An after-dark walk through a cemetery in late October seems like a night pulled straight from a Halloween movie or a scary novel.

But when Colorado teens make nighttime visits to Mount Olivet Cemetery this week, it won’t be for ghost stories or a haunted house. Instead, they’ll learn about saints, pray together for the dead, and celebrate Mass.

Mount Olivet’s “Night at the Cemetery” is an annual event for middle and high schoolers, designed to teach them about the intercession of the saints, and the importance of praying for the repose of souls.