Name | Name:CN Tower | Name:Arecibo Telescope |
Height | Height:553 m, (1,814 ft) | Height:150 m, (492 ft) |
Location | Location:Toronto, Canada | Location:Arecibo, United States |
Year Constructed | Year Constructed:1973–1976 | Year Constructed:1963 |
Description | Description:Tallest freestanding structure on land from 1975 to 2007. Remains the tallest in the Western Hemisphere. | Description:A very tall Telescope . In 2013 it was the tallest Telescope in the world. |