Experience the khlongs, or canals, of the “Venice of the East” on a longtail boat and you’ll get a special look into the heart of Bangkok. Most of Bangkok’s waterways were dug in the 18th and 19th centuries, and while some have been filled in and paved over, there are still an amazing number to explore. Several of them, such as Khlong Saen Saeb, go through the center of the city, and the Khlong Bangkok Yai, on the western side of the Chao Phraya, cuts through one of the oldest parts of town. Many tours leave from the central piers on the river and are no more than a couple of hours long.