Pakistan: Shahi Hammam in Walled City Lahore
Shahi Hammam is an old Mughal era Persian style Hammam that has fallen in neglect over the last two centuries but has been recently meticulously restored as part of a UNESCO restoration of the entire walled city of Lahore. The Hammam has multiple lavishly ornate steam and bath rooms. Especially amazing are the wall and ceiling paintings. Pretty much no tourists and you can explore the whole thing on your own.