Fractal terrain refers to landscapes that exhibit self-similar patterns at different scales, often created using mathematical algorithms. These terrains mimic natural features like mountains, valleys, and rivers, making them useful in computer graphics, simulations, and video games. The concept is based on fractals, which are complex structures that can be split into parts, each resembling the whole. In fractal terrain generation, algorithms such as Perlin noise or Diamond-Square are commonly used to create realistic and varied landscapes. These methods allow for the efficient modeling of intricate details without requiring extensive data, making them popular in fields like geographic information systems (GIS) and virtual reality.