Panoramic view of the geodesic dome structures of the Eden Project. The Eden Project is a large-scale environmental complex near St Austell, Cornwall. The project was conceived by Tim Smit and has quickly become one of the most popular visitor attractions in the United Kingdom. The complex includes two giant, transparent domes made of ETFE cushions, each emulating a natural biome, that house plant species from around the world. The first emulates a tropical environment, the other a warm temperate, Mediterranean environment. The project took 2½ years to construct and opened to the public in March 2001.