A summit cross is a big plus sign made of metal or wood that is placed at the very top of a mountain or hill. It is like a special decoration that tells people that they have reached the highest point. Sometimes, people may have to climb up a trail or walk on a path to get to the top of the mountain, and when they arrive there, they see the summit cross. This is a very exciting moment because it means they have done something that is a little bit difficult, and they can feel proud of themselves. People may also take pictures with the summit cross to remember their achievement. Overall, a summit cross is like a symbol of reaching a goal, and it is a cool thing to see when you get to the very top of a mountain!