The Cosmopolitan is a trendy hotel and casino in Las Vegas that offers a unique beach experience. The hotel features a rooftop pool called 'The Chelsea Pool' which includes a sandy beach area, cabanas, and a poolside bar. Guests can relax on the beach, enjoy the stunning views of the Las Vegas skyline, and indulge in poolside cocktails and snacks. The Chelsea Pool also hosts poolside parties and live DJ performances, making it a perfect spot for a beach getaway in Las Vegas.