Milad Tower is the tallest tower in Iran, and has an octagonal base to symbolize traditional Persian architecture. The tower, completed in 2008, is part of a large 21^st century complex in Tehran that includes a convention center and a hotel, among other facilities.

Upon its completion in 1994, the Oriental Pearl Tower was the tallest building in China and remained so until it was surpassed by the Shanghai World Financial Center in 2007. The tower has eleven spheres and multiple observation decks. Some claim that the design of the building is connected to a well-known Chinese poem.

Ostankino Tower is the tallest tower in Europe and was the tallest tower in the world when it was completed in 1967. It serves as a television and radio station and was built to commemorate the 50^th anniversary of the Russian revolution. The tower also served as a motivating factor in the creation of other large towers in former Soviet Union countries.

When completed in 1976, the CN Tower was the largest freestanding structure in the world and was not surpassed until 2007 by the then unfinished Burj Khalifa in Dubai. It remains the tallest structure in the Western hemisphere. It serves as a communications tower and has an observatory to view Toronto’s skyline. It has become a symbol of Canada.