Motihari 's the headquarters of Poorvi Champaran (East Champaran) district in the Indian state of Bihar. Geography Motihari's located at . It's an average elevation of 62 metres (203 feet). Cultural heritage Tallest Buddha Stupa in the world Motihari's reported to have the tallest and the largest Buddhist Stupa in the world, following its discovery in 1998 through excavation by the Archaeological Survey of India (ASI). Rising to a height of 104 feet, and much reduced than its reported origina… (More on Motihari)