Pea Patch Island

Pea Patch Island is a small island on the Delaware river in between Delaware City, Delaware and Finns Point, New Jersey. Given it's position at the entrance of Delaware Bay, the island was once a strategic military stronghold and famously served as a prison for Confederate soldiers captures after the Battle of Gettysburg in nearby Pennsylvania.

Today, it's home to the Fort Delaware State Park and a major stopping point for migratory birds. To get there, you need to catch a ferry at Delaware City. The ferry trip doesn't take all that long (the whole trajectory is less than a mile long) and costs $11 for adults and $6 for children.