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“A-Rose-Red-City” Petra, Jordan

Petra means "rock" in Greek. It is located about three hours south of Amman, the capital of Jordan, and was founded by a nomadic Arab tribe known as the “Nabataeans” several centuries before Christ's birth. The country of Jordan is located in the Middle East, northwest of Saudi Arabia and south of Syria. Petra is an ancient city built on a mountain slope and become one of the wonders of the world. It is now said to be one of the seventh wonder of the world and it belongs to the UNESCO world heritage site. Petra represents the ancient world’s heritage culture. It is a beauty hidden behind layers of mountain. The city was founded by digging and carving rocks as high as 40 meters. The entire red rose city of Petra has such a charismatic appeal that it attracts anyone & everyone who enters the city, taking them to a different world of divine beauty and mystery. This place has attracted millions of tourists every year. The one who visited it say that it is a site that can never be forgotten.

A complete documentary on Petra, Jordan by National Geographic :

The Legend of the Great Wall of China - China

 

One of the Seven Wonders of the World, the Great Wall of China is a man-made structure that was constructed over two thousand years ago and took about 100 years to complete. The vastness of this project brings to light the immense capabilities of man.

The Great Wall of China was built by Qin Shi Huangdi  over 2,000 years ago, the first emperor of China. In Chinese the wall is called "Wan-Li Qang-Qeng" which means 10,000-Li Long Wall (10,000 Li = about 5,000 km).

 

The Great Wall of the Ming is, not only because of the ambitious character of the undertaking but also the perfection of its construction, a masterpiece. The wall constitutes, on the vast scale of a continent, a perfect example of architecture integrated into the landscape. During the Chunqiu period, the Chinese imposed their models of construction and organization of space in building the defence works along the northern frontier. The spread of Sinicism was accentuated by the population transfers necessitated by the Great Wall.

Visibility from Earth Orbit or Moon ?????

It’s a controversial issue. NASA says, "The Great Wall can barely be seen from the Shuttle, so it would not be possible to see it from the Moon with the naked eye."

Furthermore, from the moon, even the continents are barely visible.