What U.S. monument is held together only by gravity and friction?
Gateway Arch
Mount Rushmore
Golden Gate Bridge
Washington Monument
The Washington Monument, an iconic obelisk in Washington, D.C., is a breathtaking marvel of engineering and design, held together solely by gravity and friction. Constructed from 36,000 blocks of marble, granite, and bluestone gneiss, it does not rely on any binding materials like mortar or cement. Instead, the weight of the precisely cut stones and the friction between them provide the structural integrity needed to keep the 555-foot monument standing. The monument honors George Washington and proudly holds the distinction of being both the world’s tallest stone structure and the tallest obelisk.
Correct Answer: Washington Monument