Bridge Building
For thousands of years, bridges have helped people overcome the limitations imposed by nature. At first, it was simply a tree laid across a stream or stones placed in the water to cross smaller rivers. Later, simple suspension structures made of natural materials gave way to large stone bridges designed to span major rivers and deep valleys. Today, bridges are masterpieces of state-of-the-art engineering, inspiring the imagination of great engineers and architects just as much as they command the admiration of the people who use them every day.
