The Golden Gate Bridge in San Francisco was built in 1937 and is indeed an impressive feat of engineering and noted for it's International Orange paint color. The bridge has become an iconic part of San Francisco and connects the city with Marin County to the north with 3 lanes of traffic in each direction and two sidewalks on either side for pedestrians and bicycles. The main span is 4,200 feet long and the total length of the bridge is 8,980 feet. The towers are 746 feet tall and clearance under the bridge at high tide is 220 feet. The bridge was constructed during the Great Depression and was designed by Joseph Strauss. Very spectacular bridge.