There was a viral Twitter post I saw yesterday that kind of sparked something inside me late last night.
So I did some digging and looked up a couple of magical places like this. There's something called the Y-40, which is located inside a Hotel swimming pool in Italy? I found more details at poolinsider.com.
"The Y-40 is really a labyrinth of spaces designed for different underwater swimming, diving and viewing activities. The pool features various depths for divers of all levels and some cool interactive features. It has four artificial underwater caves that simulate what you might run into in the ocean, a cylindrical area with extreme depths for experiences divers looking to push their limits, various ledges, underwater glass viewing panels for spectators and even a 43 foot transparent tunnel for visitors who don't want to get wet."
"Nemo 33 features numerous structures meant to simulate the experience of deep-sea diving, including intricate passageways and underwater caves submerged in 660,000 gallons (2.5 million liters) of water. Endowed with surreal vastness and astonishing architecture, visitors can participate in aquatic activities like swimming, scuba diving, and freediving."