el dorado

pl. El Doradoes [ Sp., lit., the gilt (sc. land); el the + dorado gilt, p. p. of dorare to gild. Cf. Dorado. ] 1. A name given by the Spaniards in the 16th century to an imaginary country in the interior of South America, reputed to abound in gold and precious stones. [ 1913 Webster ]

2. Any region of fabulous wealth; exceeding richness. [ 1913 Webster ]

The whole comedy is a sort of El Dorado of wit. T. Moore. [ 1913 Webster ]