Central Bangkok is Bangkok's city center and the most upscale sub-district. The area is bordered by Ploenchit, Rama IV, Wireless Road, and Rajadamri Road. Bangkok’s urban sprawl has changed in the past decade; the riverfront Rattanakosin, once considered as the downtown zone, has now been eclipsed by Central Bangkok, the hub of modern entertainment, luxury boutiques and high-end restaurants and bars all within close proximity of each other. Moreover, it is where most of the luxury hotels, high-end residences and embassies are located.