The Golden Gate Bridge is located in the chanel between the San Fransisco Bay and the Pacific Ocean. It is a steel suspension bridge and is 1.7 miles long and 746 feet tall. It was constructed from 1933 to 1937. The Golden Gate Bridge is a national icon and is one of the Wonders of the Modern World. When people see it, they immediately recognize it as a symbol of San Fransisco.

 

The Golden Gate Bridge is an example of a conic section because its suspension cables create the porabola shape. The bridge has two porabolas, one on either side of the bridge.

The Gateway arch in St. Louis, Missouri, is the tallest man made monument in the United States, and the world's tallest arch. This stainless steel, 630 foot tall monument was designed by Eero Saarinen, and was completed in 1965 and wsa part of the Jefferson National Expansion Memorial. In the keystone of the monument, there is a time capsule that holds the names and signatures of over 700,000 students and people. You can actually go inside the monument, as it has an elevator inside that leads to an observation deck.

 

The Gateway Arch is an example of a porabola, for its legs are in a curved porabola shape.