Iran has some of the world's most ancient, important, and beautiful architecture.
So here is a very brief introduction, from ziggurats and Zoroastrian fire temples to crystal mosques and the first ever churches...
People in the Middle Ages knew the earth was round, as you can see from this 900 year old drawing.
So where did the myth come from that Medieval people thought the earth was flat?
Well, it was once an important part of America's national identity...