Menhir Thirunakkara is a prehistoric monument located in Kottayam, Kerala. It is a tall, standing stone, approximately 5 meters in height, and is believed to have been erected around 2000 BCE. The Menhir Thirunakkara is made of a type of granite rock found locally and is considered to be one of the most significant megalithic monuments in Kerala.

The Menhir Thirunakkara is shrouded in mystery and folklore, with locals believing that it possesses magical powers and can ward off evil spirits. The monument is also considered to be a symbol of ancient Kerala's rich cultural and architectural heritage.

Today, Menhir Thirunakkara is a popular tourist attraction and is visited by people from all over the world who come to marvel at its ancient construction and learn about its history. The site is a testament to the ingenuity and skill of Kerala's prehistoric inhabitants and remains an important part of the state's cultural legacy.