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Phyiclal Features
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Man Made Features
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Forces Use Physical Features |
Physical Barriers and Gateways in Western Expansion |
| Erie Canal - Ducksters | |||
| Gettsburg PA | |||
| Washington D.C. | |||
| Kid Guide to D.C. | |||
| The New York Colony | |||
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| Old Boston | |||
| Visit Philly |