7 Wonders Of The World in 2018
7 New Wonders Of The World in 2018 Great Wall of China --- The longest wall of the Great Wall is approximately 2,145 miles. Additionally, about 1,770 miles branch from the sides, making it the longest man-made structure in the world by far. The length of all Chinese defense walls built over the last 2,000 years is approximately 31,070 miles. To put this into perspective, it could circle the world two times! The mortar used to bind the stones was made out of rice flour. Parts of the wall were surrounded by moats, which allowed for additional defense. The Great Wall attracts around 50 million foreign visitors annually. The earliest major walls were built between 260-210 B.C. by the Qin dynasty. After the Qin dynasty were the Han, Sui, Jin, and Ming dynasties. Most of what we see today is from the Ming dynasty. The height of the Great Wall varies anywhere from just above ground level to 30 feet high. Several temples were built along the wal...