🇲🇻Muraka Underwater Villa at Konrad Hotel, Maldives.
In November 2018, the Conrad Maldives Hotel opened the world's first underwater residence. This is not just a room or a comfortable suite, but much more – a whole two-storey villa built at a depth of 5 meters below the level of the Indian Ocean, capable of accommodating up to 9 guests at the same time.
https://earth.google.com/web/search/Muraka