Stays don't come cheap, though. 

Amanoi (www.aman.com/resorts/amanoi), the coastal resort inside Nui Chua National Park in southwest Ninh Tuonh province, has just unveiled two new spa houses.

Named Thuy Lien (meaning “lotus”) and An Son (“peaceful mountain”), these new arrivals come straddled by nature with facilities like a double treatment room, a contemporary hammam (Turkish steam room) or a wooden-clad banya (Russian sauna), a 15m swimming pool, relaxation deck, outdoor dining area, steam room, cold plunge pool and Jacuzzi.

Till Mar 31, they’re offering the “Spa House Experience” package where guests get daily hammam or banya treatment and 90-minute Aman or Vietnamese massage starting from US$2,100 (B74,136) per night, including transfers from Cam Ranh Airport.