Take the BTS to Saphan Taksin BTS Station. Board the free River City shuttle from Sathorn/Central Pier and alight at River City's private pier. You can also take the Chao Phraya Express Boat to N3 Si Phaya Pier and walk for 5 minutes over to River City.
About RCB Auction
RCB Auction brings to Bangkokians rare pieces of antique and art every two months.