Hoodoos are tall, thin spires of rock that rise from the ground, often found in arid or semi-arid regions. They are formed through a process of erosion, where softer rock layers are worn away by wind and water, leaving behind harder rock that stands tall. These unique formations can be seen in places like Bryce Canyon National Park in Utah. Hoodoos can vary in height and shape, often resembling towers or pillars. Their striking appearance is enhanced by the colors of the rock, which can include shades of red, orange, and white. These natural structures are popular among hikers and photographers for their beauty and geological significance.