[ WP ] You are tasked with conducting the funeral of the human race .

Assuming we have materials that can last quite some time, and can be quickly molded into what we want them to be - I would do it like this: 
 
 Pick a major class-one city nearby and use a low-yield nuke to flatten a few blocks worth' of buildings in the center so that it's easily noticed from the air by visitors from other worlds should they ever come. Quick-setting material will be used to lay a flat and very shiny material as well as a tall wall around the circle. In the center a large rust-proof metal plaque will be placed that reads in varying languages as well as a etching of a man and a woman holding hands: 
 
 `` Here on this world lies in peace what once was Humanity with all of our hopes and dreams. Should you find us, we wish we could have met you. This world and what is left of it is yours.'' 
 
 After the plaque is placed and secured, the other person and myself will commit suicide through a poison pill in front of the plaque.
