Samayapuram Mariamman Temple, north of Trichy, is one of Tamil Nadu's busiest Amman shrines. Devotees come to pray for health, protection, and family welfare, and the temple can feel intensely alive even outside major festival days.
It is less architecturally refined than Srirangam, but the devotional energy is strong. Go with respect for the crowds and rituals; this is a pilgrimage stop first and a tourist sight second.