Engineering Marvels Everywhere one looks, technology is erecting bigger and more impressive structures

	Brooklyn Bridge This drawing illustrates the submerged, pressurized chamber needed by workers who prepare foundations for the stone towers that support the bridge, which rest on the riverbed. Waste is hauled up and dumped into barges, after which the tower itself rises stone by stone, using cranes which also rise, as the construction continues
	Statue of Liberty The magnificent statue is made of sheets of copper, formed to shape in France, shipped to America, and then riveted together. Visitors reach the viewing platform by climbing a spiral staircase rising up the center of the supporting structure. An elevator was added in the 1930s.