The road from Tena descends for another ninety minutes and then flattens into something different: the Amazon basin proper, the hills flattening out, the forest changing character, the rivers widening. By the time the bus arrives at Coca — officially Puerto Francisco de Orellana, named for the Spanish conquistador who became the first European to follow the Amazon to its mouth — the jungle has become immense. The city sits at the confluence of the Napo and Coca rivers, and when you walk to the waterfront for the first time and look at the Napo, you understand you are looking at a river that does not care about your travel schedule. It is very wide and very brown and it is moving toward the Atlantic whether you get in a boat or not.
Coca has the rough, provisional energy of a town that grew faster than it planned to. The oil industry arrived in the 1960s and has been reshaping the Ecuadorian Amazon ever since, and the city has expanded around the infrastructure of that industry without ever quite absorbing it — oil company workers and indigenous Waorani people and ecotourists all occupying the same streets with varying degrees of mutual comprehension. The malecón along the Napo is the most comfortable part of town: a long promenade where families walk in the evenings, vendors sell ceviche de palmito, and the river provides a constant reminder of why people bothered to come here at all.
The fast boat downriver leaves at seven in the morning from the port below the malecón. It carries a mix of passengers: Kichwa and Waorani families returning to riverside communities, researchers with hard cases of equipment, the occasional backpacker with the particular expression of someone who knows they’re about to do something they can’t fully explain to anyone at home. The Napo is wide enough that the forest on both banks looks like a wall — a continuous green vertical surface pressing against the sky. Herons stand on every other driftwood log. There are river dolphins, if you sit at the bow and watch. Around the second hour, the signs of Coca disappear entirely and the forest is all there is, and the person beside me stopped looking at their phone.
The Cuyabeno Wildlife Reserve and the Yasuni National Park — where oil extraction and extraordinary biodiversity coexist in a political tension that was unresolved when I was there and remains so — both begin in this direction. I spent three days at a lodge accessible only by boat and foot, where the guide, a Siona man who had been doing this for twenty years, told me he still found something new on every walk. I believed him. On the first afternoon he stopped us twenty minutes into the forest and pointed up: a harpy eagle nest, occupied, the female visible as a pale shape against the dark canopy. We stood beneath it for forty minutes and nobody moved unnecessarily.
The lagoons of Cuyabeno are accessible from lodges up the Cuyabeno River tributary: black-water lakes ringed by flooded forest where kayaking at dawn feels like entering a painting of a place rather than an actual place. The water is still enough to reflect the canopy perfectly, and paddling into the reflection has a quality of illusion — you can’t tell the surface from the depth until a caiman moves. I tipped my kayak slightly trying to photograph a squirrel monkey in a tree above me. The monkey watched with what I interpreted as contempt.
When to go: February through August is generally considered the best period — the rains have passed their peak, the rivers are at useful levels, and wildlife is active. The dry months of August and September offer the best jungle walking conditions. Avoid the very high water of December through February for lodge-based trips, though the flooded forest can be spectacular by canoe. Book jungle lodges directly and well in advance — the best operators fill months ahead. The fast boat downriver is the cheapest and most atmospheric way to arrive.