Where did Buddha spend most of his life at?

Answer 1

Gautama Buddha, the historical Buddha, lived in northeast India between 563 and 483 BC. As a bodhisattva he had passed through thousands of existences before coming to Earth for his ultimate transmigration. This last lifetime he began as a son of the King of the Sakya, Suddhodana, who ruled at Kapilavastu on the border of Nepal, and was born in a village called Lumbini into the warrior tribe called the Sakyas (from where he derived the title Sakyamuni, meaning "Sage of the Sakyas").

Answer 2

Assuming that the "rest of his life" covers the period after he became enlightened not the period after he left his father's home in his search to become enlightened, the answer is that he spent his life spreading the word of his awareness of the Four Noble Truths and the Eightfold Path to enable mankind in general to escape the endless cycle of death and rebirth.

This included discussions with his disciples and scholars while travelling around Nepal and India.