Our Lady's Tank, also known as the Shrine Tank, is a sacred pond located near the Velankanni Church. It's believed to be the site where Mother Mary appeared to a shepherd boy, performing a miracle. Devotees visit the tank to bathe in its holy waters, believing it possesses healing properties. The atmosphere is serene and filled with devotion, offering a peaceful respite from the bustling surroundings. The tank is surrounded by steps, allowing pilgrims to easily access the water. It's a significant pilgrimage site for Christians and a place of spiritual importance in Velankanni. Many visitors collect water from the tank as a blessed souvenir.
The history of Our Lady's Tank is deeply intertwined with the legend of the apparition of Mother Mary in Velankanni. According to local lore, a shepherd boy was carrying milk to a nearby town when Mother Mary appeared to him near the pond. She asked him for milk for her child. After fulfilling her request, the boy continued his journey, and upon reaching his destination, he discovered that the container was still full of milk. This miraculous event led to the recognition of the pond as a sacred site. Over time, a shrine was built near the tank, and it became an integral part of the Velankanni pilgrimage. The tank continues to be a focal point for devotees seeking blessings and healing.