The rooftop and riverside pools that make Bangkok's hotels worth paying for — especially in the heat.
Four Seasons Chao Phraya's triple-tiered infinity pools are the most photographed; The Peninsula has a river-view pool; Lebua State Tower has a small rooftop option.
Several Bangkok hotels sell day passes for pool access — useful if staying at a different hotel; typically 800–2,000 THB including food and drink credit.
Rooftop pools with city views: Banyan Tree's Sky Pool at 51 floors (adults only, hotel guests); various newer hotels on Sukhumvit.
Holiday Inn and Marriott properties tend to have larger family-friendly pools; the Grande Centre Point Sukhumvit has a notable pool complex.
Book directly through the hotel or a day-pass platform rather than showing up — capacity is often limited and weekend slots at the more famous pools fill up.
Most day passes bundle a food and drink credit with pool access, and some include use of the gym or spa facilities — worth checking exactly what's covered before comparing prices across hotels.