Samsen or spelled Sam Sen (Thai: สามเสน, pronounced [sǎːm.sěːn]) is a road and neighbourhood in Bangkok considered to be one of Bangkok's oldest. Samsen road starts from Bang Lamphu intersection in the area of Bang Lamphu within Phra Nakhon district and wends northeast to Dusit district as far as it ends at Kiakkai intersection, covering 4.6 km (2.8 mi). It runs parallel to east Chao Phraya river all the route.