We got up early this morning to do a four-mile walk on the Seven-Mile Bridge, two miles out and two back. It's a fun walk, we almost always see some aquatic life in the water below while walking. Today we saw several stingrays. The Seven-Mile Bridge is a famous bridge in the Florida Keys. It connects Knight's Key (part of the city of Marathon, Florida) in the Middle Keys to Little Duck Key in the Lower Keys. Among the longest bridges in existence when it was built, it is one of the many bridges on US 1 in the Keys,…