Romans in ancient times, typically made of stone and designed to protect harbors or shorelines from rough seas and tides. Mareas were built with great precision and engineering skill to withstand the force of the ocean and create a calmer environment for ships to dock and unload their cargo. Some mareas also served as defense structures, with towers and watchtowers built into their design. Today, some mareas still exist and are popular tourist attractions in places with Roman heritage.
