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Railroad signal at Patapsco Valley State Park [01]
![Railroad signal at Patapsco Valley State Park [01]](../../../../i/upload/2024/07/18/20240718213526-eaf789a7-cu_s9999x250.jpg "Railroad signal at Patapsco Valley State Park [01] (6373 visits) Modern Industries railroad signal and crossbuck on Gun Road, at one of the exits for Patapsco Valley...")
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Railroad signal at Patapsco Valley State Park [02]
![Railroad signal at Patapsco Valley State Park [02]](../../../../i/upload/2024/07/18/20240718213530-75fc4d73-cu_s9999x250.jpg "Railroad signal at Patapsco Valley State Park [02] (3987 visits) Modern Industries railroad signal and crossbuck on Gun Road, at one of the exits for Patapsco Valley...")
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Wheelock fire alarm bell at 18310 Montgomery Village Avenue
![Wheelock fire alarm bell at 18310 Montgomery Village Avenue](../../../../i/upload/2024/07/18/20240718223926-64ad5924-cu_s9999x250.jpg "Wheelock fire alarm bell at 18310 Montgomery Village Avenue (2128 visits) Wheelock 10" fire alarm bell on the exterior of 18310 Montgomery Village Avenue in Gaithersburg...")
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Wheelock fire alarm bell
