I picked up a new follower from Benin, and in his or her honor, I spent some time looking at Benin on line. The main city of Benin, Cotonou, population approximately 1 million, is right at sea level between the Gulf of Guinea and a large bay or lake that seems geographically like Lake Pontchartrain by New Orleans. The entire short coastline of Benin is threatened by sea level rise. Perhaps the most interesting thing about the Bay is the town of Ganvie, whose transportation needs are served entirely by boat. Wikipedia says little about Ganvie, but what it says is quite interesting. I wonder what the submerged rectangular forms on the satellite view show.
Images: Ganvie via Google Maps, Wikipedia.