The Eden Project is a visitor attraction in Cornwall, England, UK. The place used to be a barren landscape – a former clay mine with no soil or plants. 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 larger of the two biomes simulates a rainforest environment (and is the largest indoor rainforest in the world) 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.

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.

More Info: en.wikipedia.org