Olympic Aquatic Center.

Madrid.

The Aquatic Center began to be built in 2004 for Madrid's first of three consecutive olympic bids (2012, 2016, and 2020). It should have been finished in 2006, but Madrid's olympic defeats slowed down the construction pace until the works completely stopped in 2010. Through the years, the budget has increased to 192 million euros, and now 93 million are needed in order to finish it. The City recently estimated its market value to be €23 million.