Act Fast, for American Express Platinum Cardholders, there is a mistake rate going on right now at the Grand Hyatt Santiago Chile, which is pricing out at $1,600 CLP which is $2.42 USD per night, which isn’t a bad deal!
You can even book the diplomatic suite there for around $4 USD per night, but to take advantage of this you have to book trough Fine Hotels and Resorts. You can view full details on this deal from this Flyertalk thread. This is good for dates through the rest of 2015 and you can book here.
Act Fast, this won’t last long!
Hat Tip: View from the Wing