Wireless Road's new skyline anchor is One Bangkok, the most ambitious mixed-use development the Thai capital has attempted in a generation, and within it sits Andaz One Bangkok, opened in 2025 across a dedicated tower that looks directly over the green canopy of Lumphini Park. Architects 49 Limited shaped the building's exterior in dark striated marble and warm bronze cladding, materials visible at the porte-cochère where laser-cut copper doors and dense fern plantings establish the hotel's particular mood before a guest crosses the threshold. PIA Interior Company Limited carried the brief for the 244 rooms and public spaces, drawing on Thai mid-century modernism as a source rather than a surface treatment — the arches and soft curves associated with landmarks like Vidyu Palace reappear in the rounded headboards, oval mirror frames, and arched room partitions that give the interiors their cohesion. The range of that approach is wide. Standard rooms keep things spare: leather-panelled bed frames in warm cognac, herringbone-patterned wall relief, floor-to-ceiling glass framing Bangkok's dusk skyline. Certain suite categories push into something more vivid, with mustard-upholstered headboards, terracotta curved sofas, and geometric rugs in saffron and rust that feel closer to 1960s Bangkok social-club chic than to conventional five-star neutrality. The rooftop bar is the most theatrical space, its circular counter set beneath a branching brass-and-globe chandelier of considerable scale, the whole room wrapped in full-height glazing above a chequerboard marble floor. The infinity pool, lined in deep teal mosaic and edged against an open view of the park, completes what is a genuinely layered property.