The Washington Post developed a list of the top-12 U.S. sites to visit that have a scientific backstory. Unsurprisingly, Monk’s Mound made the list.

“Giza has the Great Pyramid. Collinsville has Monk’s Mound.


Sure, people have been hanging around Giza a lot longer — as long ago as the 26th century B.C. On the outskirts of what is now East St. Louis, settlement barely dates back a millennium.


Yet the metropolis that flourished here in those days became the biggest and most sophisticated pre-Columbian civilization north of Mexico, an urban center of more than 20,000 people that spanned six square miles.


Monk’s Mound is what they left behind.


The 100-foot-high earthwork, the largest on the continent, is the centerpiece of an ancient city known as Cahokia.”