Below Surface

This Tag assembles a broad range of films whose action primarily unfolds far below the surface of our planet: in oceanic trenches, submerged cities, deep caverns, or remote lands at the very heart of our planet. Although the liquid element isn't a requirement for the genre, a considerable portion of these films happen to be set in depressions on the ocean floor. While not necessarily shying away from horror, an undersea milieu lends itself more to science fiction compared to films set in the epipelagic (sunlight) zone which lean heavily on the thriller/horror component presented by the disquieting menace of the ocean itself (for further information, see the "High Seas" Tag).

Indeed, forays into the earth's abysses can be considered a variation of the space exploration theme, given that both scenarios provide an opportunity to generate that same sense of wonder that stems from setting foot in an unknown world brimming with "alien" life.

Turning to the world beneath the earth's rocky surface, the most popular scenarios embrace "hollow Earth theories" - a collection of pseudoscientific beliefs about vast habitable caverns which supposedly lie within our planet, often populated by picturesque animals or even hyper-advanced civilizations (sort of an underground equivalent of the mythical Atlantis). Whether surrounded by water or rock, we find ourselves immersed in stories with a flair for adventure, characterized by recurring elements such as unexplored territory, extraordinary creatures, and futuristic technology.