Think about the most densely populated municipality in the nation. What’d you guess? New York? If so, you’re not that far off; just cross the Hudson.

Located across the river from New York, you’ll find the tiny, tiny, tiny municipality of Guttenberg, NJ. Spanning about a mile long and a mere four blocks wide, the town boasts a land area of only a fifth of a square mile.

And yet, with the large apartment buildings located across the river from NY, more than 11,000 people live in the town, giving the municipality a density of more than 57,000 people per square mile (more than twice that of New York City as a whole).

That’s a lot of people.