Tim Smit’s Eden Project, built in a deep china clay pit, is dominated by huge domed enclosures emulating two natural biomes: A rainforest environment (it has the largest indoor rainforest in the world) and the second, a Mediterranean environment. Outside are botanical gardens with native and near native British plants.
Exploring the gardens within and without takes at least a few hours, not counting the time to hike from and back up the hill to the carpark.
