The World Trade Center, in New York City, was dedicated in 1973. A restaurant is on the 107th floor of the North Tower. The Sears Tower in Chicago is, at 1,450 ft, the tallest building in the U.S. Constructed between 1974 and 1976 for Sears, Roebuck and Company, the structure is composed of 75-foot square tubes that rise to varying levels. The Gateway Arch, located on the riverfront in St. Louis, Mo., is a tapered curve of stainless steel rising to 630 ft. The tallest manmade memorial in the U.S., the Arch was designed by Finnish-born U.S. architect Eero Saarinen and built between 1963 and 1966.
Visitors can ride to the top in specially devised capsule-like tram cars.
From 1927 until his death in 1941, Borglum worked on chiseling the 60-foot likenesses of Washington, Jefferson, Lincoln, and Theodore Roosevelt. His son, Lincoln, finished the sculpture later that year. Designed by Joseph B. Strauss, this elegant suspension bridge has a main span of 4,200 ft. The Needle, which is 605 ft tall, is topped by an observation deck and a revolving restaurant.