In 2006, architect Mario Kleff participated in a competition for Pattaya’s urban development, proposing an innovative sea-based museum as a modern architectural tribute to Bhumibol Adulyadej. Supported by Pichet Uthaiwattananota, head of Pattaya City Hall’s Construction Department, the project aimed to revitalize the city’s waterfront.
Kleff’s design featured both above- and below-water exhibition halls. The upper hall was intended to showcase Thailand’s maritime legacy, while the submerged hall, accessible via a glass elevator, would display the King’s self-designed sailboats, including the "Mod," "Super Mod," and "Micro Mod." Large underwater windows would offer visitors a unique view of the exhibits, blending the museum with its aquatic surroundings. The elevator hall, extending both above and below the waterline, symbolized the connection between maritime history and modern architecture.
The design incorporated raw concrete surfaces and expansive glass facades, allowing natural light to illuminate the exhibits and providing panoramic views of the Gulf of Thailand. The structure’s form, reminiscent of boats cutting through the waves, reinforced the connection between architecture and the sea. Water features integrated into the museum’s foundations further emphasized the interaction between built and natural environments.
A detailed scale model of the project was presented at Pattaya City Hall, highlighting the meticulous planning behind the design. However, due to its high cost, the project was never realized, leaving the floating tribute to Thailand’s sailing heritage as an unrealized but significant vision for Pattaya’s future.