In the summer of 1793 the harbour was visited by a Spanish expedition assembled in Chiloé Archipelago and led by José de Moraleda.
[1] At the time of Moraleda's arrival there were apple trees growing around the harbour, likely these were planted by indigenous sea-farers of Chiloé who used to visit the area.
[1] In the first half of the 19th century two sailors from Cardiff, the Yates cousins, settled next to the harbour.
When arriving for a stop-over in Puerto Americano it was noted that American schooner Enterprise and other vessels were in place to engage in untaxed barter with the settlers.
The leader of the expedition, Juan Williams, considered this to be contraband upon which the Chilean soldiers of Ancud temporarily boarded Enterprise and forced the ship to leave.