The temple is thought to own existed from the time of Ramayana. Lord Hanuman's statue Here's 20 feet long and eight toes wide and is also underground, in the reclining placement. Consequently, it is actually also known as 'Lete (lying down) Hanuman' mandir. Half on the idol is immersed https://www.youtube.com/watch?v=6cAOQp6Twlc&t=7s