Here's how the Delos Destination website describes The Raj:
"If being pampered by our world-class spa isn’t your cup of Darjeeling Tea, the park's jungles and mountains are your only chance to glimpse magnificent beasts long vanished from your world."
So at The Raj, you can either relax and enjoy your surroundings like a beach, or you can go on an adventure. Or both! Either way, it's really expensive.
It seems as though enough potential guests were looking for something similar to Westworld, but not so violent and intense. Being listed as park six, The Raj is probably the sixth and most recent park Delos built.