Take a quick tour down ancient mythical streets on your tea break, or spend an afternoon collecting stories for the next time you need an icebreaker at a party.
Old Urban Myths, Legends & Tales at Timeless Myths Satellite technology detects giant mounds over 155 miles, pointing to sophisticated pre-Columbian culture.
The Amazon was too inhospitable, said 20th century scholars, to permit large human settlements.
Now, however, the doomed dreamers have been proved right: there was a great civilisation.
And there is a lot more to discover in these places, it's never-ending.