Upside Down (Stranger Things)

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The Upside Down is a fictional interdimensional wormhole featured in the Netflix science fiction horror series Stranger Things, created by the Duffer Brothers. Introduced in the first season (2016), it serves as a central antagonistic force and setting throughout the series, acting as a bridge between Earth—specifically a frozen-in-time replica of the town of Hawkins, Indiana—and a chaotic alternate realm known as the Abyss. Characterized by its toxic, spore-filled atmosphere, vine-overgrown landscapes, monstrous inhabitants, and psychic connections to the real world, the Upside Down originates from psychic experiments in 1983 and evolves from a perceived alternate dimension into its revealed nature as an unstable conduit, culminating in its collapse in the fifth and final season (2025). The entity draws inspiration from Dungeons & Dragons (D&D) lore, such as the Vale of Shadows, and has become a cultural symbol of interdimensional horror in popular media.