A penthouse apartment in a Fort Myers development on the Caloosahatchee River has sold for $5.3 million.
The unit is in the One Fort Myers building, a 21-story luxury tower under construction at 2581-2585 First St.
The real estate firm Serhant, which represents the developers, says the unit is a duplex on the 20th and 21st floors. It is 5,381 square feet with 2,197 square feet of exterior space…