Several geographical features in Palm Beach County somewhat confusingly share the name "Lake Worth." The city of Lake Worth Beach is named after a lagoon which is officially known as the Lake Worth Lagoon. This lagoon opens to the Atlantic Ocean at the Port of Palm Beach via the Lake Worth Inlet. The next closest inlet exists further south in Boynton Beach. The port and two inlets are all distant from the actual city of Lake Worth Beach. The lake is a long channel that spans much of northern Palm Beach County; indeed, the Intracoastal Waterway traverses the length of the lagoon. The manmade inlets to the ocean have replaced the natural freshwater with saltwater, such that the lagoon is actually now a tidal body, instead of a true lagoon.