Dubai-based property developer, Nakheel, has released a tender for ground preparation works related to its Palm 360 project.
A construction tender for the project is due later this year, with completion set for 2021.
The twin-tower luxury hotel and residential development is located on Dubai's Palm Jumeirah.
Nakheel said the contracted works would "pave the way for the construction of Palm Jumeirah's tallest structure".
Palm 360 is a 260m development comprising Raffles the Palm Dubai Hotel, and Raffles Residences Palm 360.
The project will also include the world's largest sky pool, reported to connect both towers 170m above the ground.
Located on Palm Jumeirah's western crescent, the project spans 4.64ha, with the hotel comprising 125 units, and the residences featuring 331 homes, according to Dubai Media Office.