china
It is the great wall.
the great wall of china
the great barrier reef
the great wall of china
The pyramid that took the longest to build was the Great Pyramid. It is believed it took 20 years to build and it is the oldest of the pyramids in Egypt.
The African Great Rift Valley is longest, and the Cotahuasi Canyon is deepest.
The world longest structure is the Trans-Siberian Railwaywhich connects Moscow to Vladivostock Siberia; it is 9,289 kilometres long; or about 400 kilometres longer than the Great Wall of China.
My guess would be the Great Wall of China.
On earth Katrina on other planets the great red spot
The longest mountain range on Earth is the Andes, located in South America. The Rocky Mountains in North America and the Great Dividing Range in Australia are also among the longest.
the great wall of taj minar
Any great circle (the best known great circle is the equator) which are about 24,901 miles long.