This isn't the first time we have posted the work of Tomas Saraceno. His latest, largest and most ambitious work also looks like the most fun ever. Like an adult playground! To create the mesh structure suspended 25 meters in the air, the artist worked with a team of architects, engineers and biologists (studying spiders) for over three years. The net itself weighs 3 tons and there are 6 inflated PVC spheres positioned within the mesh net. Like spiders, visitors must coordinate their activities with one another using vibration and their perception of space. Amazing.