The Great Wall of China is the longest building on earth with a length of 13,170 miles. Made from a combination of brick, stone, wood and other materials, it was originally constructed primarily to serve as a defence against the nomadic invasions from the north that threatened Chinese states / empires.
I could be wrong but I believe it's the Cape Floristic Kingdom
the war of 1812 when u.s. soldiers held up a huge american flag inspired francis scott key to write it. the sight of broad stripes and broad stars make him want to write the star spangled banner.
