3. Charminar Tunnel, Hyderabad
The tunnel connecting Charminar and Golconda fort is believed to have hidden treasures.
The tunnel, which is believed to have been constructed by Sultan Mohammed Quli Qutub Shah, provided a safe passage to the royal family from Golconda fort to Charminar, in case of emergencies.
In 1936, a survey was conducted of the tunnels, a map prepared and a report was submitted to Nizam Mir Osman Ali with several proposals for further detailed survey, but it was not clear why no follow up action was taken by the Nizam.
It is still believed that there is treasure hidden in the chambers of the tunnel.