We've long heard about the Seven Wonders of the World, among the lists are wonders of the ancient world like the Great Pyramids of Egypt and wonders of the medieval world such as Stonehenge.

But who gets to choose the New 7 Natural Wonders of the World? You do!

The Victoria Falls on the Zimbezi River

More than a billion people are expected to vote in an online poll to decide on the New 7 Wonders of the World. Niagara Falls, the Great Barrier Reef and Mount Everest are among the over 260 natural wonders that have been nominated, and voters have until July 7 to select the winners from 77 semifinalists.

Led by Swiss adventurer Bernard Weber, the New 7 Wonders campaign aims to promote cultural diversity by supporting, preserving and restoring monuments and natural sites.

"We are calling on people all over the world to actively show their appreciation for our ... natural world by joining together to celebrate the most extraordinary sites on our planet," said Tia Viering, spokeswoman of the New 7 Wonders campaign.

The Grand Canyon

The Great Barrier Reef of Australia

The list will be reduced to 21 finalists in July, chosen by a panel of nature experts and chaired by Frederico Mayor, former chief of UNESCO, the U.N. Educational, Scientific and Cultural Organization.

The seven winners will then be chosen in another round of public voting lasting until 2011, this time by Internet, telephone and text messages.

This is not to be confused with the Seven Man-Made Wonders, which were decided by approx. 100 million people worldwide - the winners were the Pyramids of Giza, Egypt; the Colosseum, Italy; the Great Wall of China; the Taj Mahal, India; Petra, Jordan; Christ the Redeemer Statue, Brazil; Machu Picchu, Peru; and the Pyramid at Chichen Itza, Mexico.

Hmm... You have until 7-7 to vote on 77 of the possible 7 Natural Wonders of the World. Got that?

Click here to vote!

via Yahoo!