This photo showcases the Gateway Arch in St. Louis, US, rising like a giant curve into a stormy sky. Its form follows an inverted catenary curve — a perfect shape in mathematics that balances weight and strength. But math is not only in the curve. If the viewer looks closely, they’ll find a tiny airplane near the base of the arch, revealing the incredible scale of this structure. This contrast — of shape and size — brings both design and perspective into focus. Sometimes, beauty doesn’t need words— it can also be expressed in the language of math.