Yes, you have to take a boat from Colon to Necocli, Colombia.
The Darien Gap is one of the last untamed “wild spaces” in the Americas or maybe the world. Between bacteria, bandits, bugs, jaguars, poisonous snakes, crocodiles, alligators, river drowning, mud slide burial etc etc, it has beaten every European who tried to tame it.
Just an example: Have you seen the video of the jaguar diving into a muddy river and dragging up a much larger alligator by the neck?
The Kuna Indians hunt jaguars with ancient single-shot shotguns. The still know how to make bows, and poison-dart-frog venom for arrows and blow guns. The Kuna are called “Jungle Comanches.” For a reason.
Fwiw, the Dutch woman’s video of her plan to cross (make that bypass) the Darrien Gap. See also the next 2 episodes. Yes, she used a lancha rapids, too.
https://youtu.be/RzX9iQlYWvI