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Washington Monument
Obelisk in Washington D.C.
The Washington Monument is the world's tallest stone structure and obelisk.
Washington Monument
Obelisk in Washington D.C.
USA
United States Capitol
Government building in United States
The United States Capitol is the meeting place of the United States Congress.
United States Capitol
Government building in United States
USA
Union Arch Bridge
Historic bridge in the United States of America
The Union Arch Bridge serves both pedestrian and vehicular traffic.
Union Arch Bridge
Historic bridge in the United States of America
USA
Bollman Truss Railroad Bridge
Truss bridge in the United States
The Bollman Truss Railroad Bridge is a landmark of industrial design and construction.
Bollman Truss Railroad Bridge
Truss bridge in the United States
USA
Thomas Viaduct
Railway bridge in the United States of America
The Thomas Viaduct is an arched stone railway bridge spanning the Patapsco River between Baltimore County and Howard County.
Thomas Viaduct
Railway bridge in the United States of America
USA
Druid Hill Lake Dam
Historic Civil Engineering Landmark earthfill dam in Baltimore, Maryland, United States
Druid Hill Lake Dam
Historic Civil Engineering Landmark earthfill dam in Baltimore, Maryland, United States
USA
Mason–Dixon Line
Border line in the United States
The Mason-Dixon line is a demarcation line separating four U.S. states.
Mason–Dixon Line
Border line in the United States
USA
Blue Ridge Tunnel
Railway tunnel in Virginia - Crozet's tunnel
Blue Ridge Tunnel
Railway tunnel in Virginia - Crozet's tunnel
USA
Philadelphia City Hall
City Hall in Philadelphia, USA
Philadelphia City Hall is the house of government for the city of Philadelphia, Pennsylvania.
Philadelphia City Hall
City Hall in Philadelphia, USA
USA
Smithfield Street Bridge
Bridge over the Monongahela River in Pittsburgh, Pennsylvania
Smithfield Street Bridge
Bridge over the Monongahela River in Pittsburgh, Pennsylvania
USA