I-Resort is one of Nha Trang's inland mud-bath complexes, built around mineral pools, soaking tubs, and spa treatments rather than the beach. It overlaps in spirit with Thap Ba and 100 Egg, but gives travellers another option when they want a lazy half-day away from the seafront.
Go for the soak, not for cultural depth. It is most useful after several days of boat trips, diving, or beach time, when warm mineral water and a quiet pool sound better than another crowded stretch of sand.