The Nilapadu Thara or Manithara, also known as the Mamangam Monument, is an ancient structure located in the state of Kerala, India. It is a stone platform that was used during the Mamangam festival, which was held once in every 12 years, to display the prowess of the rulers of different kingdoms. The platform is located in the town of Thirunavaya, on the banks of the river Bharathapuzha.

The Nilapadu Thara or Manithara is a unique architectural masterpiece that reflects the cultural and historical richness of Kerala. It is believed to have been constructed in the 14th century and has been witness to several important historical events over the years. Today, it serves as a symbol of Kerala's rich heritage and attracts tourists from all over the world.

The Nilapadu Thara or Manithara is an important cultural monument in Kerala and holds great significance for the people of the region.