Shanghai opened its 2010 World Expo to the public for a test run today, and everyone got a better look at the amazing futuristic architecture, much of it made with sustainable materials. Take a virtual tour below.

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We love the fact that there's a new World Expo, since these sorts of events usually celebrate an optimistic view of the future — something we're sorely in need of right now. With Iron Man 2's plot apparently revolving around a fictional Stark Expo from the 1970s and Tony Stark's attempt to recreate it in the modern era, it's time for a new Expo building spree. And Shanghai, semi-officially the most futuristic city now that Dubai has fallen on hard times, is the perfect place to host it.

Some pretty way-out building designs were being floated a while back for this expo, and some of the craziest are conspicuously not showing up among the photos we've looked through so far. In particular, Macau was supposed to have a building shaped like an enormous rabbit, and Denmark's pavilion looked totally insane. Fast Company had a great roundup of some of the trippier designs that were planned for the Expo a while back, but here's the ones that actually got photographed so far. Photos by AP and Getty Images.

The Information And Communication Pavilion. Photo by AP

The Information And Communication Pavilion. Photo by AP

Inside the Information And Communication Pavilion. Photo by AP.

Hong Kong's pavilion, made of recycled steel, covered with nylon. Photo via Expo site.

The Space Pavilion, Photo via Expo site.

The Chinese Pavilion. Photo by AP.


Photo by AP

Birds Nest National Stadium. Photo by AP.

Part of the entrance. Photo by AP.

A boat passes nearby. Photo by AP.

Mirrors form a sphere in the China Pavilion. Photo by AP.

Worker puts finishing touches on the Australia Pavilion. Photo by AP.

The Energy Source, a 1.2 ton sphere with 400,000 L.E.D. lights that reacts to sound, at the Germany pavilion. Photo by AP.

The U.K. Pavilion. Photo by AP.

The German Pavilion. Photo by AP.

The Bamboo Dome of the India Pavilion. Photo by AP.

Workers work on the Spain Pavilion. Photo by AP.

Spain Pavilion. Photo by AP.

China Pavilion. Photo by Getty Images.

China Pavilion. Photo by Getty Images.

Photo by Getty Images.

French Pavilion by Xinhua.