Unisphere

The icon of the 1964 New York World's Fair. Spherical stainless steel representation of Earth. Designed by landscape architect Gilmore D. Clarke.  

The Unisphere measures 140 feet (43 m) high and 120 feet (37 m) in diameter. It sits atop a 20-foot-tall (6.1 m) tripod base. The globe weighs 700,000 pounds (320,000 kg). Its base weighs 200,000 pounds (90,718 kg). 

Over five hundred pieces of steel were used in the construction of the globe.

The Unisphere is tilted at an angle of 23.5 degrees, which is Earth's normal tilt. There are three rings around the Unisphere. They show the orbits of Yuri Gagarin, John Glenn, and the Telstar satellite around the Earth.

Construction started on March 6, 1963, the last landmass was installed on August 13, 1963. The Unisphere was dedicated in early March 1964. Unveiled with the opening of the Fair on April 22, 1964.

The renovation had been planned since the early 1980s but don't have money for it. The restoration of the Unisphere began in 1993 and completed in May 1994. 

The Unisphere's fountains were rededicated in 2010.