Estonia from SATW and Estonia from Hetalia

From the 700s to the 1200s, Baghdad was an Intellectual Center unrivaled in the world. It's House of Wisdom studied mathematics, astronomy, medicine, alchemy and chemistry, zoology, and geography.

The Tornio/Haparanda course is the only two-nation golf course in the world, residing on the border of Finland and Sweden. Playing 18 holes means crossing the border 4 times.