The Pool at Hotel Vina del Mar
Hotel Vina del Mar 
 Lonely Planet
 Fodor's
 "The view from the sleek, glass-fronted lobby of Viña's top luxury hotel is a preview of what awaits upstairs – on many floors you can see the sea from your bed and even the indoor pool seems to merge with the waves beyond the window" 
 "An eighth-floor spa and infinity pool have stunning views"