The Eden Project, in a reclaimed china clay pit in Cornwall, was designed by Grimshaw Architects, formerly Nicholas Grimshaw & Partners, with Anthony Hunt Associates as structural engineer and Arup as services engineer. Tim Smit and Jonathan Ball conceived it. Construction began in 1998 and took two and a half years.
Its biomes are geodesic domes of tubular steel with inflated ETFE cushion cells, which the article says avoided glass for weight and safety. The Rainforest Biome is 180 feet (55 m) high, 328 feet (100 m) wide and 656 feet (200 m) long, and the Mediterranean Biome is 115 feet (35 m) high.
The infobox gives completion as May 2000, while the text says the visitor center opened in May 2000 and the full site on March 17, 2001. The biomes have been geothermally heated since 2023. It closed in December 2020 after landslips and reopened by May 2021.
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