Nagarahole (film)

Nagarahole () is a 1977 Indian Kannada children's film written by H. V. Subba Rao, with screenplay and direction by S. V. Rajendra Singh Babu, starring Vishnuvardhan, Bharathi and Ambarish.
Plot.
A school trip to the Nagarhole National Park turns dangerous for the children. The teachers are caught in a bind. The trip turns lucky for the principal (Bharathi) when she meets her lost husband.
Production.
Rajendra Singh Babu wanted to make a children's adventure film completely set in a forest being inspired by the books written by Enid Blyton. He approached celebrated Kannada writer H. V. Subba Rao who went for a recce to Nagarahole for 15 days with the added sub plot of naxalites lurking around the forest. H. V. Subba Rao penned an original adventure story, and dialogues for the pathbreaking film. 
The character of Ambareesh was based on a real life driver whom Babu met during the stay there. Babu revealed that the team struggled hard to shoot scenes like a tiger carrying a little boy and manchan scene, which took around 75 takes. The climax sequence were shot on the Sakleshpura Bridge with 13 tunnels at 165 ft in height and it was Asia's highest bridge. The film which began production in 1974 was not released until 1977 due to lack of takers.
The film was dubbed in Hindi and released in Mumbai and all over India and became very popular among kids of that generation. The story of some kids lost in a jungle full of wild animals, surviving on their own with no adult to protect them and yet having an adventure of their life, was something which captured the imagination of kids like no other film of that era. 
Soundtrack.
The title song "Ille Swarga Ille Naraka" was sung Ravi, and released in 2004 by Saregama.