The Pool at Pan Pacific Hanoi
The pool at Pan Pacific Hanoi is recommended by writers. Of the 5 professionals that we tracked, 4 endorsed the pool, such as Lonely Planet, Jetsetter and Star Service.
Pan Pacific Hanoi 
Lonely Planet
Jetsetter
Star Service Jetsetter
Lonely Planet "Sofitel’s not-so-historic other half, it boasts the region’s first indoor-outdoor swimming pool with a retractable roof"
Jetsetter "The heated all-season pool has a retractable roof for open-air swimming, and the spa features a sauna, Jacuzzi and hammam"
Star Service "A lap-length pool on the fourth floor is under a domed glass roof (it retracts in warm weather), with a small garden cafe terrace for refreshments"
Jetsetter "The heated all-season pool has a retractable roof for open-air swimming, and the spa features a sauna, Jacuzzi and hammam"
