You'll literally feel like royalty when you take a dip at the Raffles Grand Hotel d'Angkor in Siem Reap, Cambodia. At 37 metres long, the pool is the kingdom's largest and was inspired - both in design and proportion - by the ancient bathing pools of the Khmer kings at the temple of Phimeanakas at Angkor.
I'm surprised the largest swimming pool in the world in Chile wasn't on there! Here it is:
Gstadt palace must be a contender.
Peter Sellars made a great film there