Lord Buddha spent many rainy seasons, teaching and meditating here.
About Griddhakuta Hill
http://www.dhammawiki.com/index.php?title=Vulture_Peak
About Rajgir
http://en.wikipedia.org/wiki/Rajagaha
About King Bimbisara
http://en.wikipedia.org/wiki/Bimbisara
About King Ajatashatru
http://en.wikipedia.org/wiki/Ajatashatru