Name | Name:Arecibo Telescope | Name:Bent Pyramid |
Height | Height:150 m, (492 ft) | Height:101 m, (332 ft) |
Location | Location:Arecibo, United States | Location:Egypt |
Year Constructed | Year Constructed:1963 | Year Constructed:c. 2605 BC |
Description | Description:A very tall Telescope . In 2013 it was the tallest Telescope in the world. | Description:Angle of slope decrease during construction to avoid collapse. It was the tallest freestanding structure on land from c. 2605 BC to c. 2600 BC |