[did you know?] Singapore, Metro Manila cities, and Davao City

Singapore is larger than Metro Manila!  710 sq.km versus 640 sq.km.  That makes Singapore as a city larger than any city in Metro Manila.  But...  Davao City is 2444 sq.km!  Metro Davao is 3750 sq.km!  That's more than 3 to 6 times larger than Singapore or Metro Manila, or nearly 3 times larger than Singapore and Metro Manila combined!  The Greater Manila area which includes Pampanga, Bulacan, Cavite, Laguna, Batangas, and Rizal is around 4863 sq.km.  In comparison, the Tokyo Metropolis and New York Metropolis are 2187 and 17405 sq.km respectively.  Manila though (the city, not the metropolis) is one of the most densely populated city in the world, with 1 person per 23 square meters, second only to Dhaka in India with 1 person per 22 square meters.