Quellón is a small town at the southern end of Chiloé Island. It is a fishing and transportation hub for the area and not a particularly interesting tourist destination.
Taxis are 900 pesos (as of 2/06) regardless of destination in town. At night the price is higher
A plaque marking the end of the Panamerican Highway is just outside of town at Punta de Lapas (also a relatively good beach for this far south). Take any bus on Ladrilleros that says Punta Lapas - 20 minutes and 250 pesos.
In town be sure to stop at Kaffee Rose (Ladrilleros 135, next to the Coloso Supermercado) for great pastries and the usual Nescafe.