Heavily promoted but a bit of a letdown, the Tren del Fin del Mundo purports to take you inside the Parque Nacional Tierra del Fuego, 12 km (7½ mi) away from town, so you have to drive to get there, and it leaves visitors a long way short of the most spectacular scenery in the national park. The touristy 40-minute train ride's gimmick is a simulation of the trip El Presidio prisoners were forced to take into the forest to chop wood; but unlike them, you'll also get a good presentation of Ushuaia's history (in Spanish and English). The train departs daily at 9:30, noon, and 3 (only 10 and noon in low season). One common way to do the trip is to hire a remis that will drop you at the station for a one-way train ride and pick you up at the other end, then drive you around the Parque Nacional for two or three hours of sightseeing (which is far more scenic than the train ride itself).
Ruta 3, Km 3042, Ushuaia, Tierra del Fuego, 9410, Argentina