Fort, which was targeted several times by other foreign powers, who were at that time fighting each other to get a firm footing in Kerala. The fort is now under the protection of National Heritage Monuments. There is also a cemetery inside the fort and the oldest burial site dates to 1704. Muthalapuzhi Lake is situated in Anjengo. Varkala Tunnel Varkala Tunnel is an old tourist highlight. Its construction began in 1867 under the supervision of Travancore Diwan Sir. T Mahadeva Rao and was completed only in 1880, at the time of Diwan Sheshaya Sasthri. Varkala Lighthouse is another tourist highlight in the vicinity. Religious centres Janardana Swami Temple Janardana Swami Temple is a very important Vaishnavite shrine and attracts thousands of pilgrims. The temple is about 2,000 years old. Facing the temple is Papasnanam Beach, where devotees take a bath in the belief that the sacred waters will wash away their sins. A large bell washed up from the wreck of a Dutch merchant vessel is kept on display at the temple. Sivagiri Mutt Sivagiri Mutt is a famous ashram in Varkala, founded by the philosopher and social reformer Sree Narayana Guru. Sree Narayana Guru's tomb is also located here. The samadhi (the final resting place) of the Guru attracts thousands of devotees every year during the Sivagiri pilgrimage, from December 30 to January 1. The Sivagiri Mutt, built in 1904, is situated at the top of the Sivagiri hill in Varkala. The Sivagiri Mutt is also the headquarters of the Sree Narayana Dharma Sangham, an organization of his disciples and saints, established by the Guru to propagate his concept of 'One Caste, One Religion, One God'. The Guru Deva Jayanti, the birthday of the Guru, and the samadhi day, are celebrated in August and September respectively every year. Colourful processions, debates and seminars, public meetings, cultural shows, community feasts, group weddings, and rituals mark the celebrations. Panayara Triporittakkavu Bhagavathi Temple Panayara Triporittakkavu Bhagavathi Temple is one of the most famous Devi temples in Kerala. Meenabharani festival is the primary festival in Porittakkavu temple, celebrating the month of ‘Meenam’ (March/April) in the Malayalam calendar. Sarkara Devi Temple Sarkara Devi Temple is an old temple situated near Varkala at Chirayinkeezhu. The temple is famous for the Kaliyoot festival on the Malayalam month of Kumbham (March). Sree Saraswathy Temple The Sree Saraswathy Temple, located in Venkulam, Edava, is a VidyaDevi temple