10. Most Expensive Houses 6. Odeon Tower Sky‑Penthouse By Ghani Khan Estimated Value: $330–440 Million Rising atop Monaco’s iconic Tour Odéon, the Sky‑Penthouse redefines luxury living. Spanning approximately 35,000–35,500 sq ft across five levels, it boasts extraordinary amenities: a private infinity pool with a waterslide, multiple living areas, cinema, wellness centre, gym, sauna, and panoramic Mediterranean views. With a staggering price tag between $330M and $440M, it’s consistently identified as the world’s most expensive penthouse, symbolising opulence in one of the most exclusive real‑estate markets . Architect Alexandre Giraldi and interior designer Alberto Pinto created a sky‑high sanctuary, featuring ultra‑premium materials like marble, bronze, ebony, and even stingray‑skin‑upholstered tables. Additional features include a private nightclub, backlit marble dance floor, sweeping spiral staircase, and bespoke furnishings fitting the lifestyles of the ultra‑wealthy.