Draw bridge of some sort, very old but still in service near Boston Massachusetts. The red box above road operates when a sailboat on the Charles River needs to have the road open up so that its mast goes through without problems.

Stock photo: Draw bridge of some sort, very old but still in service near Boston Massachusetts. The red box above road operates when a sailboat on the Charles River needs to have the road open up so that its mast goes through without problems. was taken by macdragonfly .