Detail of George Washington Monument in Washington, DC highlighting the massive proportions of the obelisk. At 555 feet and 5 inches (169.294 meters), it is the world's tallest stone structure.

Royalty-free stock photo ID: 130788581

Detail of George Washington Monument in Washington, DC highlighting the massive proportions of the obelisk. At 555 feet and 5 inches (169.294 meters), it is the world's tallest stone structure.