Good hotel review, there is an onsen at Sukhumvit 24.

#Bangkok hotels SILQ Hotel & Residence :) A beautiful hotel with a new Sento that has been open for less than a year. The rooms are nice, and there is also Panpuri for use throughout the stay. The rooms are divided into zones, giving it a Residence feel :) Over King Size bed with bathtub .. The see-through pool looks beautiful. Sauna, fitness center, and Sento are all you need. Another good hotel in Sukhumvit Soi 24, near BTS Phrom Phong #BangkokTravel