If you think the human race is going to live forever, you've got another thing coming. Nothing is eternal, and our lives on this beautiful blue mud ball are no exception. But, some of our works will last long after we're all gone. Enterprising humans have turned the Earth to create monuments to our capitalist society that will last thousands of years after we're gone. Let's take a virtual tour around the world to visit some of these human artifacts aliens will find in the future.