The Solid Muldoon was a supposedly prehistoric "petrified human body" unearthed in 1877, at a spot now known as Muldoon Hill, near Beulah, Colorado. The figure enjoyed a brief tour of the United States before it was revealed to be a hoax. It was said to have been named after wrestler William Muldoon, whose nickname was "The Solid Man". This nickname was itself a reference to a comic song called "Muldoon, the Solid Man", written by Edward Harrigan.