Vintage Mackinac Bridge postcards 

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November 1, 1957 – The Mackinac Bridge, the world’s longest suspension bridge between anchorages at the time, opens to traffic connecting Michigan’s upper and lower peninsulas.
Construction on the Mackinac Bridge, ca. 1956
via Bentley Historical Library

November 1, 1957 – The Mackinac Bridge, the world’s longest suspension bridge between anchorages at the time, opens to traffic connecting Michigan’s upper and lower peninsulas.

Construction on the Mackinac Bridge, ca. 1956

via Bentley Historical Library

May 31, 1859 – The clock tower at the Houses of Parliament, which houses Big Ben, starts keeping time.

May 31, 1859 – The clock tower at the Houses of Parliament, which houses Big Ben, starts keeping time.

(via ciconenne)

Construction of Brooklyn Bridge

Construction of Brooklyn Bridge

May 24, 1883 – The Brooklyn Bridge in New York City is opened to traffic after 14 years of construction.
The grand display of fireworks and illuminations at the opening of the great suspension bridge between New York and Brooklyn (1883) 
via NYPL

May 24, 1883 – The Brooklyn Bridge in New York City is opened to traffic after 14 years of construction.

The grand display of fireworks and illuminations at the opening of the great suspension bridge between New York and Brooklyn (1883)

via NYPL