The Margaritaville casino and restaurant are now open at River Spirit Casino Resort.
Muscogee (Creek) Nation Chief James Floyd said the tribe was given the land it stands upon in the 1830s because it was thought to be worthless for farming, ranching or building.
"However, decades of leadership have held this land as a great asset for our people," Floyd said. "We've nurtured it, and we've preserved it. Today, we're standing on what can only be described as 'upeckv,' which means a dream."