 It consists of some 500 incomplete concrete pillars which are part of the unfinished Hopewell mass transit project, and is considered an unofficial monument to massive corruption.On 23 February 1991, army chief General Suchinda Kraprayoon overthrew the government of General Chatichai Choonhavan.The coup-makers, who called themselves the National Peace-Keeping Council (NPKC), appointed Anand Panyarachun as prime minister.