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1.
Peninsulas
Newfoundland is an island
2.
Countries on the Tropic of Cancer
4.
Countries on the US's Do Not Travel list
5.
Countries on the Tropic of Capricorn
6.
Countries with a higher population density than the United States
7.
Islands
Haiti isn't an island itself, it's part of Hispañola
8.
Countries on the Prime Meridian
9.
Countries on the Equator
10.
Largest Mountains in their respective continent