@2:00
"We have dragons everywhere in time and cultures and many of them(cultures) have never met"

"Portrayed remarkably similar"

@4:48
"A city in Germany is famous for its dragon fighter. In the 16th, 17th and 18th century they hung up dragon bones all across the city to prove that dragons are real"

@5:42
"Early 1900's, Iowa, "Van Meter visitor". Giant 8 ft bat like creature, horn on its head could project a light. 5th night appeared with a smaller version of itself and descended back into the coal mine, never to be seen again"

So recent

Interesting area in China,

"Zhangjiakou was historically known to Europeans as Kalgan until the mid 20th century. This name derives from the Mongolian name of the city, Cighulaltu(Classical Mongolian), "Chuulalt haalga" (modern Mongolian) or shorter, "Qaghalghan" (Classical Mongolian), "Haalgan" (modern Mongolian), which means "the gate".

"Due to its strategic position on several important transport arteries, it is a critical node for travel between Hebei and Inner Mongolia and connecting northwest China, Mongolia, and Beijing. Dajingmen, an important gate and junction of the Great Wall of China is located here"
-wiki