The Eden Project (Cornish: Edenva) is a popular visitor attraction in Cornwall, England, UK. Inside the two biomes are plants that are collected from many diverse climates and environments. The project is located in a reclaimed china clay pit, located 2 km (1.2 mi) from the town of St Blazey and 5 km (3 mi) from the larger town of St Austell.
The complex is dominated by two huge enclosures consisting of adjoining domes that house thousands of plant species, and each enclosure emulates a natural biome. The biomes consist of hundreds of hexagonal and pentagonal, inflated, plastic cells supported by steel frames. The largest of the two biomes simulates a rainforest environment and the second, a Mediterranean environment. The attraction also has an outside botanical garden which is home to many plants and wildlife native to Cornwall and the UK in general; it also has many plants that provide an important and interesting backstory, for example, those with a prehistoric heritage.
|Type||Multiple Greenhouse Complex|
|Architectural style||Inspired by J. Baldwin's Pillow Dome|
|Location||St Blazey, Cornwall, UK|
|Opened||17 March 2001|
|Structural system||Steel frame and thermoplastic|
|Design and construction|
|Structural engineer||Anthony Hunt and Associates|
The project was conceived by Tim Smit and designed by architect Nicholas Grimshaw and engineering firm Anthony Hunt and Associates (now part of Sinclair Knight Merz). Davis Langdon carried out the project management, Sir Robert McAlpine and Alfred McAlpine did the construction, MERO designed and built the biomes, and Arup was the services engineer, economic consultant, environmental engineer and transportation engineer. Land use consultants led the masterplan and landscape design. The project took 2½ years to construct and opened to the public on 17 March 2001.
Once into the attraction, there is a meandering path with views of the two biomes, planted landscapes, including vegetable gardens, and sculptures that include a giant bee and previously The WEEE Man (removed in 2016), a towering figure made from old electrical appliances and was meant to represent the average electrical waste used by one person in a lifetime.
At the bottom of the pit are two covered biomes:
The Tropical Biome, covers 1.56 ha (3.9 acres) and measures 55 m (180 ft) high, 100 m (328 ft) wide, and 200 m (656 ft) long. It is used for tropical plants, such as fruiting banana plants, coffee, rubber and giant bamboo, and is kept at a tropical temperature and moisture level.
The Mediterranean Biome covers 0.654 ha (1.6 acres) and measures 35 m (115 ft) high, 65 m (213 ft) wide, and 135 m (443 ft) long. It houses familiar warm temperate and arid plants such as olives and grape vines and various sculptures.
The covered biomes are constructed from a tubular steel (hex-tri-hex) with mostly hexagonal external cladding panels made from the thermoplastic ETFE. Glass was avoided due to its weight and potential dangers. The cladding panels themselves are created from several layers of thin UV-transparent ETFE film, which are sealed around their perimeter and inflated to create a large cushion. The resulting cushion acts as a thermal blanket to the structure. The ETFE material is resistant to most stains, which simply wash off in the rain. If required, cleaning can be performed by abseilers. Although the ETFE is susceptible to punctures, these can be easily fixed with ETFE tape. The structure is completely self-supporting, with no internal supports, and takes the form of a geodesic structure. The panels vary in size up to 9 m (29.5 ft) across, with the largest at the top of the structure.
The ETFE technology was supplied and installed by the firm Vector Foiltec, which is also responsible for ongoing maintenance of the cladding. The steel spaceframe and cladding package (with Vector Foiltec as ETFE subcontractor) was designed, supplied and installed by MERO (UK) PLC, who also jointly developed the overall scheme geometry with the architect, Nicholas Grimshaw & Partners.
The entire build project was managed by McAlpine Joint Venture.
The Core is the latest addition to the site and opened in September 2005. It provides the Eden Project with an education facility, incorporating classrooms and exhibition spaces designed to help communicate Eden's central message about the relationship between people and plants. Accordingly, the building has taken its inspiration from plants, most noticeable in the form of the soaring timber roof, which gives the building its distinctive shape.
Grimshaw developed the geometry of the copper-clad roof in collaboration with a sculptor, Peter Randall-Page, and Mike Purvis of structural engineers SKM Anthony Hunts. It is derived from phyllotaxis, which is the mathematical basis for nearly all plant growth; the "opposing spirals" found in many plants such as the seeds in a sunflower's head, pine cones and pineapples. The copper was obtained from traceable sources, and the Eden Project is working with Rio Tinto Group to explore the possibility of encouraging further traceable supply routes for metals, which would enable users to avoid metals mined unethically. The services and acoustic, mechanical and electrical engineering design was carried out by Buro Happold.
The Core is also home to art exhibitions throughout the year. A permanent installation entitled Seed, by Peter Randall-Page, occupies the anteroom. Seed is a large, 70 tonne egg-shaped stone installation standing some 13 feet (4.0 m) tall and displaying a complex pattern of protrusions that are based upon the geometric and mathematical principles that underlie plant growth.
The domes provide diverse growing conditions, and many plants are on display.
The Eden Project includes environmental education focusing on the interdependence of plants and people; plants are labelled with their medicinal uses. The massive amounts of water required to create the humid conditions of the Tropical Biome, and to serve the toilet facilities, are all sanitised rain water that would otherwise collect at the bottom of the quarry. The only mains water used is for hand washing and for cooking. The complex also uses Green Tariff Electricity – the energy comes from one of the many wind turbines in Cornwall, which were among the first in Europe.
Controversially, one of the companies the Eden Project currently partners with is the British mining company Rio Tinto Group.
The clay pit in which the project is sited was in use for over 160 years. In 1981, the pit was used by the BBC as the planet surface of Magrathea in the 1981 TV series of the Hitchhiker's Guide to the Galaxy. By the mid-1990s the pit was all but exhausted.
The initial idea for the project dates back to 1996, with construction beginning in 1998. The work was hampered by torrential rain in the first few months of the project, and parts of the pit flooded as it sits 15 m (49 ft) below the water table.
The first part of the Eden Project, the visitor centre, opened to the public in May 2000. The first plants began arriving in September of that year, and the full site opened on 17 March 2001.
The Eden Project was used as a filming location for the 2002 James Bond film, Die Another Day. On 2 July 2005 The Eden Project hosted the "Africa Calling" concert of the Live 8 concert series. It has also provided some plants for the British Museum's Africa garden.
In 2005, the Project launched "A Time of Gifts" for the winter months, November to February. This features an ice rink covering the lake, with a small café/bar attached, as well as a Christmas market. Cornish choirs regularly perform in the biomes.
On 6 December 2007, the Eden Project invited people all over Cornwall to try to break the world record for the biggest ever pub quiz as part of its campaign to bring £50 million of lottery funds to Cornwall.
In December 2007, the project failed in its bid for £50 million of funding, after the Big Lottery Fund popular vote, when it received just 12.07% of the votes, the lowest for the four projects being considered. Eden wanted the money for Edge, a proposed desert biome that was going to look at people and plants living on the edge today and the solutions that they have come up with to the challenge of living within limits.
In December 2009, much of the project, including both greenhouses, became available to navigate through Google Street View.
The Eden Trust revealed a trading loss of £1.3 million for 2012-13, on a turnover of £25.4 million. The Eden Project had posted a surplus of £136,000 for the previous year. In 2014 Eden accounts showed a surplus of £2 million.
The World Pasty Championships have been held at the Eden Project since 2012, an international competition to find the best Cornish pasties and other pasty-type savoury snacks. The Eden Project is said to have contributed over £1 billion to the Cornish economy.
The Eden Project received 1,024,156 visitors in 2017. 
Since 2002, the Project has hosted a series of musical performances, called the Eden Sessions. Artists have included Amy Winehouse, James Morrison, Muse, Lily Allen, Snow Patrol, Pulp, Brian Wilson and The Magic Numbers. 2008's summer headliners were: The Verve, Kaiser Chiefs, and KT Tunstall. Oasis were also set to play in the summer of 2008, but the concert was postponed because Noel Gallagher was unable to perform after breaking three ribs in a stage invasion incident several weeks before. The concert was instead played in the summer of 2009. 2010 saw performances from artists including Mika, Jack Johnson, Mojave 3, Doves, Paolo Nutini, Mumford & Sons, and Martha Wainwright.
Made out of a single piece of granite, its surface has been carved with 1,800 nodes in the pattern of a Fibonacci spiral – the growth pattern found across the natural world in things like sunflowers, pine cones and ammonites