I happened to watch this documentary on the National Geographic Channel. In this time and age of improper medical facilities for the rural poor, India's Hospital Train is a blessing for the interior parts of the country.
I am unable to find the NGC link to this. But here's a BBC link http://www.bbc.co.uk/programmes/b00jf4jq
This facility, also called the Lifeline Express, is run by an organisation called Impact India in collaboration with the Indian Railways. The train stops for a period of four weeks at a place and treats patients for polio, eye-related problems, ENT and so on. It works on the concept that if you cannot reach a hospital, the hospital will come to you. Surgeries are performed on this stationary train as well, all free of cost.
More information on their Wikipedia page http://en.wikipedia.org/wiki/Lifeline_Express