Nine outlandish architecture proposals unlikely to see the light of day

Following British studio Apollodorus Architecture's proposal for a stadium styled like the Colosseum, Dezeen has rounded up nine highly ambitious architecture designs that may not be realised.
From a 93-kilometre cycle highway encircling Dubai to satirical proposals responding to events in the news, the list includes sports centres, skyscrapers, parks, and residences that push the boundaries of design.
However, even the most extraordinary of architecture proposals can't be written off, as T