Some might guess the Florida Keys, but unfortunately that guess is wrong. Think Pacific Ocean. Think Hawaii. Ah, now you are in the right direction. The answer is appropriately named, South Point on Hawaii’s Big Island.
Kirstin Jackson of Seattle Times wrote this interesting piece about her trip to South Point: It sounds like it is off the beaten tourist path and worth the time to visit it. As if being at the southernmost tip of the US wasn’t unique enough, there is even a green sand beach nearby!