After Foster + Partners' design for the Tulip tower was recently rejected by the UK government, we round up 10 other high-profile building projects that were never actually built.

Mexico City airport by Foster + Partners
The Tulip is not the first time Foster + Partners has seen its design efforts go unrealised. Construction on this airport for Mexico City was half-complete when the project was cancelled in October 2018.
The cancellation came after a public referendum on the airport was called by Andrés Manuel López Obrador, who was at that time Mexico's president-elect, and resulted in a majority vote against it.
López Obrador had made cancelling the project a key part of his election campaign over concerns about the $13.3 billion expected cost, as well as alleged corruption and environmental worries. Find out more about the cancelled Mexico City airport ?

Two World Trade Center by BIG
For a while, Copenhagen-based BIG's vision for a skyscraper made from stacked glass boxes that decrease in size as the building ascends seemed to be the strong forerunner for the Two World Trade Center.
But after a protracted back-and-forth, the developer of the World Trade Center site in New York opted last year for a skyscraper by Foster + Partners over BIG's design.
A tower that is similar in spirit could still grace the Big Apple skyline, however. Last month, Adjaye Associates launched proposals for a building that resembles an upside-down version of the BIG World Trade Center tow...