One of the most amazing examples of erosion shaping rock formations is Balanced Rock in Arches National Park. The rock formation is probably the Park's most recognizable formation. While being named Balanced Rock, the formation is not technically balancing the rock but rather, it is one solid piece of sandstone. The formation is pretty big, measuring 128 feet tall with the "rock" portion being the top 55 feet of it. The "rock" portion weighs a mere 3,600 tons. While it is currently defying gravity, it will collapse some day like it's smaller "sibling", "Chip off of the Old Block" did in 1976.