12 sacred Jyotirlingas

The attraction you are looking for is officially called Shivalaya Park (often referred to as the “Waste to Wonder” or “Bharat Map” park) located in Prayagraj, Uttar Pradesh. There is no prominent park named “Himalaya Park” with this theme, but Shivalaya Park perfectly matches your description of a park featuring replicas of the 12 sacred Jyotirlingas.