The "wonders of the world" usually refers to the New Seven Wonders of the World,

 Which are: 

1. Great Wall of China 

2.  Petra                             

3.  Christ the Redeemer

4. Machu Picchu

5. Chichén Itzá 

6.  the Colosseum

7.  Taj Mahal.

 This list was established through a global poll, with a separate list existing for the Seven Wonders of the Ancient World.