[2] Sanam Chai station is in the middle of Rattanakosin Island, or Bangkok's old town zone, which is a conservation area and has historical significance.

The interior is finished under the theme of the early Rattanakosin era, as designed by expert in Thai architecture and national artist Pinyo Suwankiri.

The inside is decorated with Sadom pillars (main pillar), these are etched with tiles carve into the shape of the Pikul flower sharpe, which signify prosperity, with the pillar edges adorn with blooming lotus shapes, with long curve petals leaning toward the centre, the bottom of each large petals engrave with smaller petals and coated in gold leaf.

The ceiling painted with star sharpe stencils to resemble the atmosphere of the throne hall in Rattanakosin era.

without a roof and with specially designed escalators, in order to not obscure the view of Museum Siam located behind the exit.