Temple of Hercules Gaditanus

The Temple of Hercules Gaditanus is a partly submerged archaeological site off the coast of Sancti Petri in Cádiz Province, Spain. Column fragments and the rectangular foundation emerge from the shallow bay waters at low tide.

Phoenician traders built the sanctuary between the 9th and 8th centuries before Christ on a small island near the ancient port of Gades. Romans later continued using the site and expanded it into a major center of worship in the western Mediterranean.

The structure honored Melqart, the Phoenician god of navigation, whom Roman visitors later identified with their own hero. Ancient writers record that military commanders traveled here to make offerings and vows before major campaigns.

Access to the ruins depends on tidal levels, as the site remains flooded for several hours each day. Visitors should check a local tide calendar and wear comfortable footwear for walking safely across slippery stones.

Ancient sources mention two tall bronze columns at the entrance that stood visible from far away and helped sailors navigate. Priests kept a fire burning inside that classical accounts say was never allowed to go out.