Vimalagiri church, also known as the Immaculate Heart of Mary Cathedral, is a prominent Christian pilgrimage site in the Kottayam district of Kerala. Built in the stunning Gothic architectural style, the church has a towering 172-foot spire, making it one of the tallest church towers in Kerala. The church, locally known as Angathattu Palli, serves as the Cathedral of the Diocese of Vijayapuram. 

Every year in December, Vimalagiri church hosts a grand annual feast, drawing pilgrims from across the state. The intricate designs on the stained glass windows and the detailed interiors further enhance the church's beauty, making it an architectural and spiritual marvel. Its central location and architectural grandeur make it a must-visit for anyone exploring Kottayam. Vimalagiri church stands as a testament to the region’s rich Christian heritage and cultural significance.