अस्वाभाविक - Unnatural
His death was unnatural.
रहस्यमय - inscrutable
He believes that a certain portion of life must remain inscrutable.
अलौकिक - unworldly
There was something slightly unworldly about him.
विलक्षण/ विचित्र/ अनोखा - quaint
attractive because of being unusual and especially old-fashioned:
In Spain, we visited a cobblestone plaza with quaint little cafés around its perimeter.
पैसा वसूल/ कम मेहनत में ज्यादा सफलता मिलना - Bang for the buck
This hotel is bang for the buck. Here you will get very good food for very little money.