In addition to housing a significant piece of American history, Ft. McHenry offers one of the best and most romantic views in the city. After you've spent an hour or so meandering the fort (which you have to pay for, but your admission ticket is good for a week), enjoy the walking trail that surrounds the fort. You'll see people playing frisbee and locals in lawn chairs, and it's a great place for a picnic. Be sure to stay late enough to enjoy the sunset-- it's a perfect ending to your day.
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