Huh, I thought about Ushua, but is nto for Antatica

just for it being at the southern tip of Argentina. Argentina is the only country in South America I want to have a thorough trip. (Really dont care about Brazil or Amazon River, after I learn about how many types of vaccination and pills one needs to take in order to safely visit Amazon).

Never thought about you could find a "walk-on" cruise from Ushua.

I would imagine it would be those small, explorer type cruises, not those cruises offered by Crystal, Celebrity or the like.

Thanks for the interesting info.