Leticia is Colombia's far southern Amazon city, cut off from the rest of the country by road but tied tightly to the river and to its neighbours: Tabatinga in Brazil and Santa Rosa in Peru. It feels less like an edge than a meeting point, with three countries, several Indigenous cultures, river trade, jungle guides, and motorbikes all sharing the same humid streets.
The town itself is not beautiful in a conventional way, but it has a strong identity. At dusk, Parque Santander fills with screeching parakeets. The Ethnographic Museum gives a useful primer before visiting communities upriver. Just outside town, Mundo Amazonico and the Yahuarcaca lakes offer easier ways into Amazon ecology.
Leticia is also the main Colombian base for longer Amazon trips: boats to Puerto Narino, jungle lodges, dolphin-watching lakes, and river journeys toward Peru or Brazil. Come prepared for heat, rain, mosquitoes, and slow logistics; that is part of the bargain.