Ten outlandish architecture proposals unlikely to see the light of day

Following British studio Apollodorus Architecture's proposal for a rugby stadium styled like the Colosseum, Dezeen has rounded up 10 outlandish architecture designs that capture the imagination but are unlikely ever to 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.
Here are 10 conceptual architecture proposals unlikely