Learn all about oil at the Arkansas Museum of Natural Resources in Smackover, one of 52 state parks in Arkansas. The oil boom made the city of El Dorado wealthy, and it still has a bustling downtown built around the county courthouse. Originally incorporated in 1843, the 1921 boom saw the population grow exponentially. Billionaire H.L. Hunt’s oil empire began here when he won an interest in an oil well in a poker game, and lived in El Dorado until he followed the oil west to Texas in 1932. Lunch at fayray’s is excellent, then take the walking tour of 15 historic buildings clustered around the square.