The Magnificent Seven
the Great Wall of China; India's Taj Mahal; the centuries-old pink ruins of Petra in Jordan; the Colosseum in Rome; the statue of Christ overlooking Rio de Janeiro; the Incan ruins of Machu Picchu in Peru; and the ancient Mayan city of Chichen Itza in Mexico
My own personal list would be headed by the Internet, GPS, the Cellphone and Unmanned Vehicles. You can add anything you like afterward. Every day that I get up the power of these human achievements just hits me upside of the head. Maybe we should start a poll that rebuilds the old medieval lists. The New Seven Deadly Sins or the New Seven Pagan and Christian Worthies. Building lists is fun.