I’ve Been to Six of Seven Wonders of the World! (and I didn’t know it!)

In 2007 100 million people voted to decree which were the new ‘Seven Wonders of the World’, and they decided on – the Pyramids (Egypt), Petra (Jordan), the Colosseum (Italy), The Taj Mahal (India), The Great Wall of China (not sure which country), The Statue of Christ the Redeemer (Brazil) and Chichen Itza (Mexico). Which ones have I visited?