The group, One Dream, One Team, wants a 350-acre park near Florence. The group says the park, called Coyote Canyon, will be themed on Arizona history and geography and will include a roller coaster that goes underground.

One Dream, One Team chose Florence because it's between the two cities and because of the area's Old West history.

The group's CEO says estimates show the park costing $600 million, but there are no plans to request public funding.

Earlier this year, legislators approved funding for a rock 'n' roll park in Arizona.

For more, visit azcentral.com.