Two maps on the flyleaf of an historical account of a British expedition in the area of the Muskingum River in what is now Ohio. One shows the route...
The Alleghany and Monogahela Rivers come together to form the Ohio River near Pittsburgh, Pennsylvania.
General view as fans gather outside Heinz Field prior to the game between the Penn State Nittany Lions and the Pittsburgh Panthers on September 10,...
General view as fans gather outside Heinz Field prior to the game between the Penn State Nittany Lions and the Pittsburgh Panthers on September 10,...
Downtown Pittsburgh skyline at night with the Fort Pitt Bridge spanning the Monongahela River to the right, and the Fort Duquesne Bridge spanning the...
Downtown Pittsburgh skyline at night with the Fort Pitt Bridge spanning the Monongahela River to the right, and the Fort Duquesne Bridge spanning the...
Kayakers makes their way under the Rachel Carson Bridge up the Allegheny River in Pittsburgh, Pennsylvania on August 25, 2016.
The Duchess Gateway Clipper makes its way along the Allegheny River towards the Fort Wayne Railroad Bridge, also known as the Pennsylvania Railroad...
The Duchess Gateway Clipper makes its way along the Allegheny River under the Fort Wayne Railroad Bridge, also known as the Pennsylvania Railroad...
The Duchess Gateway Clipper makes its way along the Allegheny River under the Fort Wayne Railroad Bridge, also known as the Pennsylvania Railroad...
Kayakers makes their way under the Andy Warhol Bridge up the Allegheny River in Pittsburgh, Pennsylvania on August 25, 2016.
View of the Pittsburgh Skyline as Fireworks go off over the Allegheny River next to PNC Park after the Pittsburgh Pirates game against the Chicago...煙火匯演
