The 50-year-old showed off her flawless figure in a black string bikini as she soaked up the sun and traipsed around the water.
If only we all looked that amazing at her age!
Ivana later divorced the billionaire, and Maples and Trump wed in 1993. The marriage lasted for six years, and they have a daughter together, Tiffany.
Click through for more photos of Marla...