A slot canyon is a narrow, deep gorge formed by the erosion of rock, typically sandstone, through water flow. These canyons are characterized by their steep, towering walls and often have a winding, twisting path. The unique shapes and colors of the rock formations create stunning visual effects, especially when sunlight filters through the narrow openings. Slot canyons are commonly found in arid regions, such as the American Southwest, with famous examples including Antelope Canyon and Zion National Park. They can vary in width, sometimes only a few feet across, and can be challenging to navigate due to their confined spaces and potential for flash floods.