21. The Dutch built a fort at the southern end of Manhattan Island known as Fort Amsterdam. 22. Morgan Filler, 25, of Seattle won the 20th annual Manhattan Island Marathon Swim on Saturday. 23. Several tunnels also link Manhattan Island to New York City's outer boroughs and New Jersey. 24. A 1903 newspaper advertisement for real estate on the island compared it to the next Manhattan Island . 25. At its heart was the trading facility of New Amsterdam on the southern tip of Manhattan Island . 26. His earliest publication ( 1811 ) was a Latin text catalogue of plants found on Manhattan Island . 27. At full production, the Retsof mine employed 225 people and was roughly the size of Manhattan island . 28. On some days, the population density of the central city will far exceed that of Manhattan Island . 29. Now, the river is classified as swimmable from the southern tip of Schodack Island to Manhattan Island . 30. Now, it turns out, the Indians didn't really sell Manhattan Island for $ 24.
