The indoor rooftop jazz bar at the Hillton hotel isn't going to win any prizes for ambience, but as far as incredible city views go, it stands alone. Flanked in every direction by slanted glass windows, guests can look out across all of central Bangkok from the less-visited Thonburi side of the river while sipping on a cocktail or glass of wine. Aim to get there just before sunset to enjoy the the twilight sky over Wat Arun and the Grand Palace at its most stunning.