Long canoe type boats which have a roof to protect you from the rain somewhat but offer a great view of the river.
The boatman piloting our canoe. The river and forest can be seen in the background.
Here you can see how deep the forest is and the river wide.
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Here are some related photos of boats: Canoes on the river Hooghly or Fishing Trawlers in the Gulf of Thailand
More tourist boats: A Nubian Boatman from Egypt or locals in boats like a Chinese Man ferrying cycle in canoe or Two boatmen in a canoe in the ocean