Come for the sign, stay for the views -- the sign marking the end of the Pan-American Highway linking North America to South America, the views of Bahia Lapataia (Lapataia Bay) in Tierra del Fuego National Park.
You'll reach here on Argentina Route 3, which ends with a parking lot and a much-photographed sign that announces, in Spanish, the termination of Route 3 but doesn't mention this is also the end of the Pan-American Highway, other than to list a distance from Alaska that I believe is several thousand kilometers less than the true figure.
By the way, don't confuse this sign at the end of the paved world with the fin-del-mundo (end of the world) sign in downtown Ushuaia (see my review, "Bottom's up!"). Pick your preferred end-of-the-world sign and defend it to the death! The argument for this one: it's only 600 miles to Antarctica, and there are no roads beyond this point.
Don't stop at the sign, though. Beyond it, an elevated wooden pathway takes you across pretty countryside to a nice bay view.
* There's another sign of interest here, a blue-and-white one proclaiming "Las Malvinas son Argentinas" ("The Malvinas Are Argentina's"). It's a not-so-subtle dig at British tourists, reminding them that, even though Argentina lost the 1982 war for possession of what Britain calls the Falklands Islands, in Argentina's mind those islands are theirs.
* This is NOT, as some have said in their Bahia Lapataia reviews, where the End of the World Post Office is (see my review, "Really special delivery").