I propose that metropolises are the best ‘golden spike’ for the
Anthropocene. Based on six selection principles with three ideas, I have
identified seven metropolises in seven countries as sites for the
Anthropocene’s ‘golden spike’ symbols and museums. I hope that the
United Nations will artificially design and build identical
Anthropocene’s ‘golden spike’ and museums in these seven metropolises as
permanent stratigraphic markers of the Anthropocene.