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| Pennsylvania Facts |
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The Liberty Tunnel in Pittsburgh, Pennsylvania opened in 1924. At that time the 5,700 foot facility was the longest artificially ventilated automobile tunnel in the world. |
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Philadelphia, Pennsylvania was once the United States capital city. |
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The oldest stone railroad bridge in use in Pennsylvania is the Starrucca Viaduct that crosses PA Route 171 north of Lanesboro in Susquehanna County. |
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