2. Rooftop Pool Bar, Singapore

Located on the roof of Changi Airport’s Terminal 1 in Singapore, the amazing rooftop pool bar is actually property of the next-door Ambassador Transit Hotel. Entry is free for hotel guests but any air travelers looking for a little rest and relaxation to pass the time can enter for a small fee. The bar is famous for its Singapore Sling cocktail, which you can sip while lounging on a cabana bed.