SO/ Bangkok — A Rooftop Infinity Pool Looking Across All of Lumpini Park
If you've ever seen a photo of a rooftop pool with a green park and the Bangkok skyline in a single frame, there's a good chance you were looking at SO/ Bangkok. The hotel sits on the corner of North Sathorn Road, opened in 2012 as SO Sofitel Bangkok, and what guests keep coming back to isn't only the infinity pool facing Lumpini Park — it's the whole building, designed by Parisian couturier Christian Lacroix together with two Thai designers, with the 237 rooms split across the four natural elements. It reads less like a big-chain property and more like a hotel with an actual point of view.
SO/ Bangkok opened in 2012 as SO Sofitel Bangkok before moving to Accor's SO/ brand. The tower stands on the corner where North Sathorn Road meets Rama IV, directly across from Lumpini Park. Design has been the selling point from day one — Parisian fashion designer Christian Lacroix developed the concept with two Thai designers, Smith Obayawat and Pongthep Sagulku. The 237 rooms are themed around the four elements (earth, water, wood and metal, with fire reserved for the kitchens), and each element carries its own palette and materials: wood rooms get bamboo flooring and oak furniture, water rooms are washed in blue from wall to wall.
The thing everyone comes to SO/ Bangkok for is the infinity pool, where the edge looks out over Lumpini Park and the financial-district towers in one shot. People like to call it Bangkok's Marina Bay Sands — a stretch, honestly — but at sunset, with the light hitting the water and the Silom skyline behind it, this is a view only a handful of Bangkok hotels can offer. Two floors of dining sit up on level 29: HI-SO Rooftop Bar and Park Society. Non-guests can come up for a cocktail and the view, which is a low-commitment way to test the atmosphere before you book a room.
"Swimming in the early evening as the sun dropped, with the green of Lumpini Park and the skyline lined up behind it — that view alone was worth the room rate."
For food, Red Oven on floor 7 is an open-kitchen buffet that several reviewers single out as a trip highlight — separate stations for Thai street food, seafood and Western dishes, with the menu chalked onto big red boards that have become the room's signature look. Breakfast is served here too. There's also Mixo, the lobby bar for afternoon tea and cocktails, and SO SPA, a set of treatment rooms in dark wood and black marble that reviews consistently describe as quiet and genuinely relaxing.
The location works well if you want to be central without sitting on a chaotic main road. It's about a 3-minute walk to Lumphini MRT, which puts Silom, Sam Yan and the rest of the line within easy reach. Sala Daeng BTS is a longer walk, roughly 12–15 minutes. The real bonus is Lumpini Park directly across the road — easy to cross over for a morning run or a walk. ICONSIAM and Chinatown are a short Grab ride away, since this sits closer to the old-city side of town.
The Trip.com score is 9.1/10 from 812 reviews, with most praise going to the design, the views and the staff. The honest catch, mentioned more than any other, is the elevators — some guests find they have to change lifts twice to reach their room, and waits get long at peak times. A few reviews note that the more design-heavy element rooms run dark inside, and that high-season rates climb quickly. Worth knowing before you book so none of it comes as a surprise.
On price, SO/ Bangkok starts around ฿6,800/night for a SO Cozy room in normal periods, which makes it a more reachable luxury design 5-star than several Chao Phraya riverside properties at the same level. High season (November–February) and long weekends push rates to ฿9,000–12,000, so book 3–4 weeks ahead. If you want more space, look at the SO Studio (65–74 sqm) or the SO Lofty Suite, the latter designed by Thai artists.
The bottom line: SO/ Bangkok suits travellers who want a design hotel with character, strong city views and a quick walk to the subway, at a rate that hasn't crossed into the mid-five-figures. If you like photography, love a rooftop pool, and can shrug off an occasional elevator wait, it delivers. If you're after the polished, classic service of a riverside grande dame, weigh it against options like Mandarin Oriental or The Okura Prestige first.
Summary from Booking & Agoda
- ✓ Infinity pool view over Lumpini Park is excellent, especially at dusk
- ✓ Each element room has a distinct, photogenic design
- ✓ 3-minute walk to Lumphini MRT, easy access into town
- ✓ Red Oven buffet is good with a wide range of stations
- ! Elevator waits at peak times, sometimes a two-lift change
- ! Some element rooms run dark by design
- ! High-season rates climb quickly
- ✓ Top-tier Bangkok city views from rooms and the pool
- ✓ HI-SO Rooftop on floor 29 has great atmosphere and cocktails
- ✓ Staff friendly and attentive, colour-changing butterfly-pea welcome drink
- ✓ Lumpini Park across the road for morning runs and walks
- ! In-building wayfinding is confusing at first
- ! SO Cozy rooms are compact for the price point
- ! Bar and pool get busy on weekends
- 💡If elevators frustrate you easily — reaching some rooms means changing lifts, and peak-time waits are real → leave extra time before heading out, or avoid the check-in/out crush hours
- 💡If you prefer a bright room — the metal and wood element rooms run dark and design-heavy → ask for a water-element room or specify a Lumpini-facing room when booking
- 💡If you're coming mainly for the pool — it isn't huge and gets crowded on weekend afternoons and evenings → go before 9 am for an emptier deck and better light