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Web Exclusive: Riverside, IL

Web Exclusive: Riverside, IL

Web Exclusive: Riverside, IL

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Web Exclusive: Greenbelt, MD

Web Exclusive: Greenbelt, MD

Web Exclusive: Greenbelt, MD

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Web Exclusive: St. Augustine, FL

Web Exclusive: St. Augustine, FL

Web Exclusive: St. Augustine, FL

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Web Exclusive: Levittown, NY

Web Exclusive: Levittown, NY

Web Exclusive: Levittown, NY

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Web Exclusive: Seaside, FL

Web Exclusive: Seaside, FL

Web Exclusive: Seaside, FL

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Web Exclusive: Southwest Washington, D.C.

Web Exclusive: Southwest Washington, D.C.

Web Exclusive: Southwest Washington, D.C.

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Web Exclusive: Pearl District, Portland, OR

Web Exclusive: Pearl District, Portland, OR

Web Exclusive: Pearl District, Portland, OR

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Web Exclusive: Salt Lake City, UT

Web Exclusive: Salt Lake City, UT

Web Exclusive: Salt Lake City, UT

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Monuments | Vietnam Veterans Memorial, Washington, D.C.

Monuments | Vietnam Veterans Memorial, Washington, D.C.

Monuments | Vietnam Veterans Memorial, Washington, D.C.

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Streets | Boston Post Road

Streets | Boston Post Road

Streets | Boston Post Road

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9:13

Streets | National Road, Cumberland, MD to Vandalia, IL

Streets | National Road, Cumberland, MD to Vandalia, IL

Streets | National Road, Cumberland, MD to Vandalia, IL

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5:04

Streets | St. Charles Avenue, New Orleans, LA

Streets | St. Charles Avenue, New Orleans, LA

Streets | St. Charles Avenue, New Orleans, LA

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4:18

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10 That Changed America

Web Exclusive: Fairmount Park, Philadelphia, PA

Geoffrey gets a behind the scenes tour of the water works station, Fairmount Park.