Given this paragraph about Freddie Mercury, where was his last performance with Queen.

Context: Throughout his career, Mercury performed an estimated 700 concerts in countries around the world with Queen. A notable aspect of Queen concerts was the large scale involved. He once explained, "We're the Cecil B. DeMille of rock and roll, always wanting to do things bigger and better." The band was the first ever to play in South American stadiums, breaking worldwide records for concert attendance in the Morumbi Stadium in São Paulo in 1981. In 1986, Queen also played behind the Iron Curtain when they performed to a crowd of 80,000 in Budapest, in what was one of the biggest rock concerts ever held in Eastern Europe. Mercury's final live performance with Queen took place on 9 August 1986 at Knebworth Park in England and drew an attendance estimated as high as 200,000. A week prior to Knebworth, May recalled Mercury saying "I'm not going to be doing this forever. This is probably the last time." With the British national anthem "God Save the Queen" playing at the end of the concert, Mercury's final act on stage saw him draped in a robe, holding a golden crown aloft, bidding farewell to the crowd.

Answer: Knebworth Park