The Pool at St. Louis Union Station Hotel, Curio Collection by Hilton
St. Louis Union Station Hotel, Curio Collection by Hilton's pool is endorsed by travel writers. Out of 2 professionals that we tracked, 3 mentioned the pool, including Michelin Guide, Gayot and Star Service.
St. Louis Union Station Hotel, Curio Collection by Hilton 
Michelin Guide
Gayot
Star Service
Michelin Guide "An outdoor swimming pool
and close proximity to the kind friendly
City Museum makes this an ideal spot
for families"
Gayot "Guests have access to high-speed Internet and there is a fitness center, outdoor pool and sauna on-site"
Star Service "The are cabanas available for rent around the large pool, but it is a seasonal affair"
