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No—not on the evidence available. Eden Project describes its Rainforest Biome as the world’s largest indoor rainforest, but that is narrower than proving the whole attraction is the biggest conservatory in the world. What is clear is its striking scale: the Rainforest Biome is about 50 metres high and 16,000 square metres in area, according to Eden’s published figures.
Is the Eden Project the biggest conservatory in the world?
That broad ranking is not established by Eden Project’s published information. “Conservatory” can refer to different kinds of enclosed botanical structures, and a fair global comparison would need consistent measurements—such as enclosed area or height—and clear rules about what counts.
Eden does make a specific superlative claim: its Rainforest Biome is the world’s largest indoor rainforest. That is Eden’s description of the rainforest attraction, not an independently demonstrated ranking of conservatories generally. Eden’s Rainforest Biome page gives the context for that claim.
How large are Eden’s Biomes?
Eden Project’s architecture information publishes these dimensions:
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| Structure or area | Published figure |
|---|---|
| Rainforest Biome | About 16,000 square metres; 50 metres high |
| Mediterranean Biome | About 6,540 square metres; 30 metres high |
| Outdoor Gardens and both Biomes together | About 13 hectares, compared by Eden to 35 football pitches |
The 13-hectare figure covers the Outdoor Gardens and both Biomes together; it is not the enclosed floor area. Eden also lists 426 tonnes of air inside the Rainforest Biome.
What is inside the Rainforest Biome?
The Rainforest Biome recreates a warm, humid rainforest environment. Eden says it contains more than 1,000 varieties of plants, with temperatures ranging from 18°C to 35°C. The site suggests allowing about 1.5 hours to see everything in the biome. These are Eden’s visitor and site figures, rather than a general measure of the whole attraction.
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What is the Eden Project?
Located in Bodelva, Cornwall, the Eden Project is an educational charity and visitor attraction built in a former clay mine. Its two covered Biomes present rainforest and Mediterranean environments, alongside outdoor gardens, exhibits and activities focused on plants and the natural world.
Its scale serves an educational purpose as well as an architectural one. Co-founder Sir Tim Smit describes the inspiration this way: “The main inspiration was that most people didn’t realise that without plants there’s no life on earth. Effectively, the Eden Project is a monument to the importance of plants.” Eden Project’s homepage also reports more than 25 million visitors since it opened in 2001.
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How extensive are the outdoor grounds?
Eden’s visitor page describes 30 acres of contemporary Outdoor Gardens. Separately, a 6 March 2026 Eden Project press release describes a 200-acre landscape, including 28 acres of outdoor gardens and a 180-acre Outer Estate. These figures come from different page contexts and should not be combined into one definitive measurement of the gardens.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Planning a visit
The address is Eden Project, Bodelva, Cornwall, PL24 2SG. Eden lists bus, train, cycling, walking and driving as ways to arrive; its visitor page says parking is free and includes electric-vehicle charging points. Free daily Biomes tours are also listed, with details posted at the site. Check Eden’s visitor information for transport and practical details.
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Opening hours vary over the year. Eden says it closes on Christmas Day and on some winter weekdays, so check the current schedule before travelling. The Biomes can be warm while the weather outside is changeable; Eden recommends wearing layers and bringing sun protection, a water bottle and waterproof clothing. Its all-weather visiting tips explain how to prepare for the contrast between indoor and outdoor areas.
As listed on Eden’s ticket page on 7 October 2026, online General Tickets cost £35.50 for adults aged 16 and over, £32 for students with ID and £12.50 for children aged 5–15; children under five enter free. Eden said these tickets included unlimited visits for one year and that booking online saved at least 10%. Prices and terms can change, so check the current ticket page before booking.
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