The canal (khlong) Saen Seap goes from east to west, it is parallel and close to the skytrain line in the very center (the big malls). There is a public boat service that runs on this canal during day time and the service is very convenient in order to bypass the heavy road traffic. It is especially convenient if you want to travel between the center of town (big malls) and the old part of the city (Khason road, Wat Saket and the big palace).
The service operates only during day time, it costs between 10 to 20 baht and it is fast (20 minutes from Wat Saket to MBK). It is also fun and interesting to take a ride with these boats but not very comfortable because you need to be in good shape in order to climb into and out of the boat and also the water from the dirty canal sometimes splashes on passengers.
Remark : At Pratunam station (station 0), you sometimes need to change boats in order to continue on the canal (different administrative sections).

Here it is on a Google map :

Important tourist stations along the canal :

• Panfa Leelard (station No.4 , last station to the west)
  • Wat Saket temple – very close to the canal
  • Khaosan road – need to walk 20 minutes
  • Grand palace – need to walk 30 minutes
• Sapan Hua Chang – (station No. 1)
  • MBK mall, Siam mall
  • Jim Thompson museum
  • Skytrain stations Siam, National stadium
• Pratunam – (station No. 0)
  • Central world mall,  Fashion mall, Pratunam market,  PC mall
  • Skytrain station Chitlom – need to walk 15 minutes
• Nana
  • Skytrain Nana – need to walk 20 minutes
• Asok
  • Skytrain Asok, MRT Sukhumvit – need to walk 20 minutes
  • Terminal 21 mall

 In addition to the information on this page, you can use the smartphone applications Google Maps and Moovit, in order to know the right way of transport to your destination. I am explaining about this in the page about the Buses of Bangkok.
See the Page of Transport for information about all the ways of Transport in Bangkok.
For more details see khlong saen saep on Wikipedia

More on Bangkok and Thailand :

• Where to Stay in Bangkok  – Potential Zones for the Hotel
• How to book Trains, Buses, Flights, Hotels for Thailand
• What to Visit in Bangkok ?  – The Tourist Attractions
• Bangkok Transport  – Airport, Metro, Buses, Boats…
• To the Islands – Which Island to visit + Stay + Arrive
• To Chiang-Mai – What to Visit, Stay, Transport
• To Pattaya city – What to Visit, Stay, Transport
• The Cost to Visit Bangkok – Common Prices
• The Nightlife of Bangkok – The animated zones
• Visa for Thailand- Basic rules and  how to extend
• Internet in Thailand – Buying a local SIM
• Useful Products for the Trip to Thailand
• Maps of Bangkok – With places of interest and Transport
• Bangkok FAQ – Weather, Distances etc…
• Bangkok Shopping  – The big Malls and the Markets
• The Khaosan Road Survival Guide  – The famous Backpackers
• A Tour of Bangkok – An overview
• Taxi Scams in Bangkok  – Common Scams of Taxi and Tuk-Tuks
• Go-Go Bar Scams in Bangkok – What to expect
• Vegetarian in Bangkok

Other Stuff :

• Info about 2 more cool cities: Barcelona and Tel-Aviv
• What to Pack ? the visual list that will help you prepare the suitcase.
• Visit my Vegetarian Page. Why be Vegetarian ? What to eat ?
• Visit my Salsa Dance Page. Salsa main Styles. Why Dance Salsa ?
• Listen to nice Songs with translation in French, Spanish, Italian, Hebrew.
• Listen to basic Words In Spanish, French, Hebrew

  If you find incorrect data on this page, like a restaurant that has closed or a big river that has moved or you want to tell me something, please write me to contact.