This passage may be of interest:
"That end of the world wherein one is not born, does not grow old or die, pass away or reappear, that I declare, is impossible to be known, seen or reached by travelling. But, friend, I do not declare that one can make an end of suffering without reaching the end of the world. Friend, I do proclaim that in this very fathom-long body, with its perceptions and consciousness, is the world, the world's arising, the world's cessation and the path leading to the world's cessation." A.N. II.48 Rohitassa (pali text) translated by Nanananda in Concept and Reality page 83.
AN 4.45 Link: http://www.accesstoinsight.org/tipitaka ... .than.html