How are arches still standing?

Arches remain standing due to their unique structural design, which distributes weight evenly along their curved shape. This design allows forces to be transferred down to the ground, creating stability. Additionally, the materials used, such as stone or brick, are often durable and have a high compressive strength, enabling them to withstand external pressures over time. The combination of these factors ensures that arches can endure for centuries, even in challenging environments.