Six of the original seven wonders of the world no longer exist. There is a campaign by a non profit organisation in Switzerland to replace them with new more modern man made wonders.
On of the choices available is the colossuem in Rome:
This will definitely be one of my choices in my vote. Whenever I visit Rome the Colosseum never fails to impress. It is a mighty, immense structure. If you want to cast your vote for your favourite, click here and register online. The top votes will be announced at a convention in Portugal, on the 07.07.07