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Sirnapally Waterfalls, Janaki Bai Waterfalls or Telangana Niagara Waterfalls are located at Sirnapally village in Dharpalle Mandal. It is located at 20 kilometres from Nizamabad, Telangana.
Sirnapally Rani or Seelam Janaki bai of Siranapally Dynasty was a landlord family and owned thousands of acres in pre-independence era. Seelam Janaki built the pond in those days. Water from this pond flows into Ramadugu Project. She contributed to a great extent for the agriculture development of the district by constructing several water ponds. She constructed Manchippa Cheruvu (Pond) for drinking water needs of Nizamabad District.
Seelam/sheelam Raja Ramalinga Reddy and Rani Janaki bai were landlords in sirnapally village. their son seelam ram boopal reddy was a retired IAS officer. Great grand daughter of Janaki bai is Anuradha Reddy, she is the convenor for INTACH(Indian National Trust for Culture and Heritage) chapter of Hyderabad.