China has built the world’s largest single-dish radio observatory (FAST) at a cost of $171 million. The telescope, also known as the ‘Eye of Heaven’, took 5 years to build in a remote area in southwest China. Its 500m-wide dish is made up of ~4,400 individual, adjustable aluminum panels. – WTF Fun Facts
Source: https://www.nature.com/articles/d41586-019-02790-3