Constructed circa 1850 an acorn-shaped gazebo can be found in Acorn Park in Silver Spring, Maryland. The park is all that remains of Francis Preston Blair's estate.
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The Maryland Renaissance Festival is held from August and October in Crownsville.
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The Bollman Truss Railroad Bridge in Savage, Maryland is made of both cast iron and wrought iron. It is the only open railroad bridge of its type anywhere in the world