Chamber of Secrets: Secret tunnels of India

National Library of Kolkata With many stories surrounding around this 250 years old library building built by the Nawab of Bengal in 1760, locals claim that a secret tunnel runs through this building, now presumably being blocked by mud to strengthen the structure used by the architects. People even say that this place once served as torture room by Britishers

Padmanabhaswamy Temple, Kerala Situated in Kerala's Thiruvananthapuram, the secret chambers of Padmanabhaswamy Temple has attracted several curious minds to know what lies behind the closed doors. After a case filed against the Royal Travancore family in 2011, coins, gold, ornaments, statues worth billions were discovered behind the vaults

Charminar, Hyderabad It was suggested that once the Charminar and the Golconda fort were interconnected through a tunnel that is hidden. This passage was however never found although there are more than a dozen structure that lead to the support the existence of the 430 years old monument

Amber Palace, Jaipur There is an open air tunnel in Amber Palace that connects it to the Jaigarh Fort in the city. It is almost 325 metres long and is said to have been built in the 18th century. It was inaugurated as a tourist destination in 2011. 

Red Fort, Delhi Nothing can be more mysterious than the Red Fort in India, which is famous for its several tunnels and chambers, that have now being closed down by the government. One recent discovery was a tunnel at Red Fort directly connecting the State Legislative Assembly.

Pargwal Tunnel, Jammu and Kashmir This tunnel was discovered by the Indian Army in 2014. It is a 20 feet deep tunnel with no ends found yet. It is a clear indication of trespassers of LOC trying to pass into India but not successding

Talatal Ghar, Assam Two tunnels have been discovered at this secret army base of the Ahom rulers built in the 18th century, which is also part of the Rangpur Palace. One of the tunnels is 3 km long and connects to Dikhow river while the other is a 16 km long escape route that leads to Garhgaon palace

British era tunnel under Mumbai's JJ hospital This 133-year-old British era tunnel discovered under Mumbai's JJ hospital has amazed history lovers, opening a whole lot new world of secret passages, chambers hidden below our city