St. Mark's Tower, also known as Qalet Marku Tower, is a historic watchtower located on the northeastern coast of Malta. Built in the 17th century by the Order of Saint John, this coastal fortification was part of a network of towers used to defend the island against invaders. Today, St. Mark's Tower stands as a testament to Malta's rich history, offering visitors a glimpse into the past. The tower is situated in a scenic area with beautiful views of the Mediterranean Sea, making it a popular spot for history enthusiasts and photographers.